Dr. Suresh Kumar lives in India and enjoys writing about medical topics.
If you think you may have been bitten by a spider, chances are you are not in serious danger. In most cases, your wound can be treated with basic first aid.1
In fact, if you didn't actually see the spider bite you, that bump, bite, rash, or redness you're experiencing could be due to a wide range of things—including other types of bug bites, pimples, cysts, skin infections, or MRSA.
Even a medical professional may not be certain what bit you unless you happened to catch the offending bug or spider, or unless the bite is producing distinctive symptoms.
Though most spiders are technically poisonous, in the vast majority of cases, their fangs are too small to cause humans much trouble. Typically, the only result of a spider bite is an itchy, red wound that goes away in about a week.
In North America, there are only two medically significant spiders. These are the brown recluse and the black widow.
Symptoms of Black Widow and Brown Recluse Bites
|Spider||Physical Characteristics||Bite Symptoms||Geographical Location|
Brown spider with six eyes and violin shape on back.
A red ring forms around a white wound (looks like a target or bullet). A blister develops on the skin surrounded by red.
South Central and Southern U.S.
Plump black spider with red hourglass figure on underside of abdomen.
Two puncture marks, spreading muscle cramping and pain, sweating, muscle rigidity.
Warm Southern and Western States
What to Do
According to HealthLine, if you are experiencing any of the symptoms in the above table, you should:2
- Wash wound with soap and cold water
- Wrap ice in washcloth and apply to wound for 10 minutes, remove for 10 minutes, and repeat.
- Go to the ER or get a doctor or a medical professional's help.
If You Can, Take a Photo of What Bit You
When you go to the doctor, you will need to give as much information as possible about the bite, your symptoms, and what you saw bite you (if you saw it). If possible, and if you can do so safely, try to catch the spider or take a photo of it.
First Aid for Other Types of Spider Bites
The vast majority of bites of any kind (spider or not), can be treated with basic first aid:
- Wash the area with soap and water.
- Put a cold compress or ice pack on the area (protecting the skin from extreme cold) for about 10 minutes at a time to reduce swelling.
- If there is itching, you can apply calamine lotion (an anti-histamine), or a paste of baking soda and water several times a day.
- Elevate the part of your body that is affected by the bite.
- Over-the-counter pain killers, like acetaminophen (Tylenol), may be necessary to relieve the pain.
- Keep the wound clean and apply antibiotic ointment.
- Let any blisters pop on their own.
When to See a Doctor or Get Medical Help
See a doctor if you are experiencing:
- Abdominal cramps
- Swelling of face, lips, or throat
- Breathing problems
- If the wound gets continually worse or spreads after applying basic first aid
Could It Be a Skin Infection?
Did you see the spider or bug bite you? If not, it's possible that it could be a skin infection. Follow the first aid tips above, and if the problem seems to be getting worse after 2-3 days, you should get professional help.
Read More From Youmemindbody
What NOT to Do When Bitten
- Do not touch or massage the bitten area. If the spider was venomous, you should leave it alone in order to avoid spreading the venom.
- Do not engage in any physical activities after being bitten.
- Avoid heating pads. In the event that the spider emitted necrotic venom, the heat may facilitate the process of necrosis (dead skin tissue).
- Avoid steroid creams.
- Sucking out the venom is not recommended.
What a Doctor Will Do
There is no one treatment for all spider bites—it all depends upon the type of spider and severity of the bite. The doctor will begin by evaluating your symptoms. If there are signs of tachycardia, cardiac drugs may be given. Other medications may also be given to treat necrosis (dead skin tissue).
Your doctor may recommend a tetanus booster shot if you haven't had one in the last five years. You may need antibiotics if the bite becomes infected.
Serious cases may require medical evaluation. In some instances, patients may be closely monitored at the hospital.
In rare cases, surgery may be needed, especially if necrosis identified on the spider bite. Surgical evaluation is also necessary if the presenting symptoms are worsening.
More About Brown Recluse Spiders
If you have:
- A red ring that forms around a white wound that looks like a bullet or a target
- A blister that has developed on the skin
You may have been bitten by a brown recluse.3 It's possible you won't have felt anything when it bit.
Where They Live
Typically, these spiders live in South Central and Southern U.S. states (including Kansas, Oklahoma, Texas, Louisiana, Arkansas, Missouri, Mississippi, Alabama, and parts of Georgia, Tennessee, Kentucky, Ohio, Indiana, Illinois, Iowa, and Nebraska).
If you don't live in these areas, it's highly unlikely this is what bit you. These spiders also only attack if they are disturbed. They do not aggressively attack humans.
What They Look Like
These spiders are brown, slightly larger than a quarter, and have a distinctive marking on their back that looks like a violin, or fiddle. This can be easily mis-identified however. If you happen to see or catch the spider, the best way to identify it is by looking at its eyes. These spiders only have 6 eyes, instead of the usual 8.
What Happens When They Bite?
People will react differently to the venom. In 90 percent of cases, bites heal without medical attention and will not scar. You will see a small red mark that will heal soon.
For those who are more sensitive, a small blister may appear, the skin may become hard, and it may become blue-grey surrounded by red. It could turn into an open wound. Victims could also experience chills, fever, or headache.
If You've Been Bitten:
- Wash the area of the bite with soap and water
- Put a cold compress on for 10 minutes. Remove for 10 minutes, then repeat.
- After, go immediately to the emergency room. If possible, bring either the spider or a picture of it to help identify it.
More About Black Widow Spiders
If you have:
- Two puncture wounds on the skin that cause pain and burning
- Spreading cramping and muscle pain
- Muscle rigidity
- Chills, fever, nausea, or vomiting
- Severe belly, back, or chest pain
Then you may have been bitten by a black widow.
Where Do They Live?
Black widows are mostly found in warm Southern and Western states. They like to live in piles of leaves, woodpiles, or in the attic. Like the brown recluse, they only attack if they feel threatened.
What Do They Look Like?
Only female black widows are dangerous to humans. They are plump and black, roughly the size of a quarter, with a red hourglass shape on the underside of their bellies, so check the spider if you caught it or saw it.
If You've Been Bitten:
- Clean area with soap and cold water (do not massage the tissue to prevent venom spread)
- Remain calm
- Do not apply a tourniquet
- Wrap ice in towel and apply to the wound for 10 minutes, remove for 10 minutes, then repeat
- Get medical help immediately
These bites are rarely fatal. Only the very young, the elderly, or people with weakened immune systems are at risk of fatal reactions.4
Why Spiders Bite
While some spiders are aggressive, most spiders tend to hide and prefer dark and isolated places. Spiders often bite in self-defense, when they sense harm from another living creature. People are bitten because we may have harmed them unknowingly.
Most bites by spiders in the United States will only cause an itchy red spot that clears up in a few days. That's because most spider fangs, or chelicera, are too short to completely penetrate human skin. While some bites are almost painless, others can feel like a bee sting.
One of the main concerns about a spider bite is the potential effects of the venom. As mentioned, some dangerous species of spiders can inflict little to no pain upon biting, and so they, therefore, can go unnoticed. But some spider bites are dangerous. So identifying the type of spider and seeking treatment is important.
You can help prevent spider bites by shaking out boots, gloves, blankets, and other clothing before using them, especially if they've been in storage. Similarly, when entering storage areas, make a lot of noise to scare spiders away. If you have a spider problem, you can also seek professional help.5
Other Common Spiders That Bite
- Hobo spiders: These large brown spiders are common in the Pacific Northwestern U.S. Symptoms of their bites are similar to those of a brown recluse. Seek medical attention to hasten the healing process.
- Tarantulas: Common to the warm Southwestern U.S., the bite of these big, hairy spiders feels like a painful bee sting. Seek medical attention to monitor heart rate and breathing, as the bite can make breathing difficult.
- Wolf Spiders: Found in all areas of the U.S. these spiders actually stalk and can be aggressive. Their bite can tear the skin and cause pain, redness, and swelling. They have two eyes in front that are much bigger than their other 6.
More Dangerous Spiders
Here are some more dangerous spiders that are found world-wide. Bites from these kinds of spiders in North America are extremely rare.
- Redback spiders
- Brazilian wandering spiders
- Tree-dwelling funnel-web spiders
A bite from one of these spiders can produce intense pain and other symptoms such as chills, fever, nausea, vomiting, and severe abdominal pain.
Other serious cases of manifestations are leg cramps, body aches, sweating, exhaustion, tachycardia, dizziness, and shortness of breath, confusion, and even unconsciousness. A visit to the emergency room is a must if the bite victim experiences any of these symptoms.
The world's most potentially dangerous spiders, when they bite people, are the Sydney funnel-web spiders and Brazilian wandering spider.
These spiders may be more dangerous than black widows because their fangs are longer and they can inject more venom deeper into the skin.
Spider Bite Pictures
Remember that children, the elderly, and those with depressed immune systems are the most likely to have severe reactions to spider bites of any kinds. If you or the person you care for falls into one of these groups, you should seek medical attention.6
- Mayo Clinic Staff. "Spider Bites." May 14, 2016. MayoClinic. Accessed April 6, 2017.
- Story, Colleen M. (medically reviewed by Debra Sullivan, PhD, MSN, CNE, COI). "How to Identify and Treat Spider Bites." October 20, 2016. Healthline. Accessed April 6, 2017.
- Reviewed by Neha Pathak, MD. "Brown Recluse Spiders: What to Know." January 3, 2017. WebMD. Accessed April 6, 2017.
- "Black Widow Spider Bite - Topic Overview." November 20, 2015. WebMD. Accessed April 6, 2017.
- Esposito, Lisa. "How to Detect and Treat Spider Bites." <http://health.usnews.com/wellness/articles/2016-07-08/how-to-detect-and-treat-spider-bites>. July 8, 2016. U.S. News & World Report. Accessed April 6, 2017.
- "Insect Bites and Stings and Spider Bites - Topic Overview." August 21, 2015. WebMD. Accessed April 6, 2017.
This content is accurate and true to the best of the author’s knowledge and does not substitute for diagnosis, prognosis, treatment, prescription, and/or dietary advice from a licensed health professional. Drugs, supplements, and natural remedies may have dangerous side effects. If pregnant or nursing, consult with a qualified provider on an individual basis. Seek immediate help if you are experiencing a medical emergency.
Amir Muhammad on April 13, 2020:
Ingormative article i like this
Nina McCutcheon on January 13, 2020:
Make sure you put Diametric Earth, in-wall holes and along lower walls along with frames, Windows, rugs. It kills every insect, spider in House and outside.
james d sweeney on November 24, 2018:
I have been bitten twice in one month.1st cleared in 1 week. 2. I am having issues with. been three weeks, swelling,puss and blood. it has been worse. pain swelling, head aches, fever. now it is the size of a quarter deeper in the body. It leaking especially when I try to get more out of it. I know it needs lanced. I don't have ins. emergency room?
Lisa on September 16, 2018:
My husband gets heat rash that's not a problem. He is starting to get hives on his back shoulder blades. Not sure why ? He said they itch terribly. We have a brand new home and new furniture. Any suggestions what we can do or what is causing this hanis issue.
Doug C. Prouty on September 02, 2018:
My girlfriend son is 29 and had been bitten by a spider. Maybe brown recluse. Red and his left arm don't want to function and numb. He is down in Texas.
Suzanne on October 17, 2017:
I have a bite but it's a dark red and swollen
Trish on September 10, 2017:
I believe my husband was bit on the foot by a spider. I have seen atleast 3 in my house in the last week two of them in the last 2 days. It is red with a little blister in it and all swollen. He is in alot of pain. It doesn't itch and he doesnt have any other side affects besides what I have mentioned. We are keeping it elevated, using cold rice bags and antibiotic ointment on it. Also giving him motrin for the pain. I have to see the doctor tomorrow who is also my husbands doctor so we are going to have him look at it. I bought some sticky spider (insect) traps to put around the baseboards in the rooms we spend the most time in.
Stepbanie on September 02, 2017:
How do I treat a spider bite? My husband has 3 bites on his arm
Rebecca Ruby on August 28, 2017:
I keep getting bite by a brazillan spider
Ana on August 28, 2017:
I got bit on my arm 3 times it's painful and very itchy ..looks like the second picture but my skin is hard on the bitten area.. I also got bit on my leg!
maria on August 19, 2017:
just got bit cleaning the garage, 2 feet from me i saw a big spider , the size of a silver dollar . it was a deep green, it looked like a garden spider, but i have never seen one that big. it took a bit to kill him in such a panic state of mind. curled up and dead he was still the size of a half dollar. well anyway my foot swelled the bit was an inch below my pinky toe on the side of my foot. i couldnt walk or put my foot down, i got hives around my neck and the inside of my forearms. its been 3 days much better still red and swollen but i can walk.
Dianne on August 17, 2017:
Got bitten and didn't feel the bite.But swelling,itching .Looks like the third picture.
Sarah forbes on August 16, 2017:
I have noticed everal sites and never saw anything like them but I am nauseous , diarrhea etc.
Sakinea barnett on August 15, 2017:
I have recently got bitten people that sees it say it's a spider bite it's red and a little swollen but it has one bite Mark not two it hurts I didn't see what bit me it happened there days ago but it's swelling now it's doesn't have a ring around it nor turning back my question is should I be concerned because I've never been bitten by anything before so I don't know what bites looks like?
Dylan on August 12, 2017:
Was bitten yesterday (8/11) while sleeping; two puncture marks on my right foot, near the ankle. I went to the ER when the pain in that area increased, and I had cramping in my right calf and chest as well as increased sweating. I could only guess that it was a black widow that bit me, since after looking at the various types of spider bites that was the closest that I could identify. However because the doctor was unable to deduce whether or not it was a black widow, he didn't give me any antivenom. Now today (8/12, 4 pm Central Time), it has gotten down in swelling and the cramps are limited to mild cramping in right calf and right arm (where I gotten a shot-most likely a tetanus shot), but the bite mark and the area of the shot are now deep blue/purple. I've been bitten by a wolf spider once but it did not look like this; I have severe hemophilia type A, so I'm not sure if I'm in a critical situation or not.
Brooke on August 11, 2017:
My son got bit by i believe a spider the redness where he got bit is the size of a softball all swollen and warm cant see any puncture marks but it continues to get bigger and spread any ideas as to what bit him
Douglas on August 10, 2017:
Bitten by a small black spider with no markings with a shiny body causing a Swelling knot on the back of my head. And it's getting bigger.
Kelly hellinger on August 07, 2017:
Was outside pulling weeds now I have several black dots with a red ring around them and don't have any idea what they could be don't really itch bad but I am concerned never have seen any thing like these before
jkitty85 on August 02, 2017:
Leyland-did you ever find out what it was? I found a similar irritation on my son's arm last night and it got my attention because of the size and the dark pink ring around the edge. Was about the size of a silver dollar.....
Winona on August 02, 2017:
I got bit in the night when I was sleeping don't knw if it was a spider or mosquito its big n red been 2 days not like a rash
I have no idea
Barbara Hair on July 30, 2017:
My boyfriend got bit by a brown recluse spider. Could or would it be okay to use Clindimyacin or Keeflex? Antibiotics?
Leyland Marcus on July 26, 2017:
I got bit by (what I believe to be) a spider on the back side of my knee and up the thigh 2 inches, it looks like the second picture from the bottom (of the ones above two or three paragraphs) and I think I was sleeping whilst it happened, texture of a rash, not painful, not itchy, not sure what it is. I did later find a spider in my room beside my bed, I killed it to fast to get a good look but it looked like a black house spider. Any clues anyone?
Andrea Osborne on July 21, 2017:
I have a large bite on my chest and I'm not sure if it's a spider bite or a large mosquito bite and I'm terrified of spiders so just ready this was hard
mike on July 20, 2017:
my wife got bit by a spider and we can't identify the bite
Brenda Jones on July 20, 2017:
I have so many spiders on my pool patio so yesterday there was this really ugly one chasing me,via scared to death of spiders so I got a broom and killed it but it was peggie and baby spiders were everywhere , and one bit me on my small finger within an hour after being bit my whole left hand was in so much pain,I almost went to Yue hospital then later on I started getting really sick to my stomach
Today still have little pain but nothing like yesterday Thank God.I will say this one thing that researchers & Doctors do not have all the answers to bug bites, because a lot of people like myself to do report them ( Spider bites, Bug Bites), Because I know for a fact that I was bitten by a spider not a Black Widow or Brown Recluse but a spider and I had some pretty awful side effects, so God help anybody that does get bitten by a really Bad Spider. One more thing this site is not for comments about whom is going to become President of the USA
Grow up, we have sites for stuff like that Dr's & others do not have the time to read ass nine questions. Have a great day..Hope all find the answers your looking for..
Nick on July 20, 2017:
So I Felt A Bite The Other Day, And It Felt Like A Pin-Prick Grazed My Hand And Sliced It A Little. I've Been Experiencing Nausea, Vomiting, Rapid Pulse, And For The First Day Itching, But I Didn't Find A Spider. What Could It Be?
Joshua on July 09, 2017:
So my newfew got bite by a spider and it swelled to about the size of a quarter wide and he says it itchy but if he touch it a certain way it brings him pain. What do you have to say??
DeWayne on July 06, 2017:
I think I was bitten by a small spider, it was outside, dark, never saw any spider.
It felt hot at first, then felt like a needle barely pricked me. I have swelling and itching still after two days.
What type of spider could this be?
Becky Scourfield on July 03, 2017:
My sister has just been bitten by an insect, it is on her hand and has swollen up quite significantly and is realising a white liquid. What should we do??
Ashley Lynn Congram* on July 01, 2017:
This spider is kind of like half brown reculis spider but this one is different because it has the brown recluse legs and the face was red and also the fangs to and also it burns???
A Bathroom-Spider bit a Bar-Bee (not a Bar-Fly) on July 01, 2017:
I have both recluse and bwidow symptoms..
Amber on June 29, 2017:
Thank you, Doctor, for your excellent information...I found it very thorough, informative and helpful, and consulted with a nurse who said it was the best she's seen on spider bites.
Lola M on June 27, 2017:
Thank you for the informative & reassuring article.
Mel on June 22, 2017:
I got bitten by something and believe it to be a spider. It in the crcrook of my elbow and about the size of a 1/2 dollar coin. SEVERLy itchy and seems t have several blisters around it that look yellow at the moment. Should I pierce them an squeeze? the itch is pretty much intolerable. in two days of absolute grrrrr. Oatmeal paste works better than baking soda but its very temporary
Tina Berry on June 22, 2017:
I already have skin issues and severe Fibromyalgia. I have felt worse than normal( by not feeling well at all) . My lower left chin is swollen, I have been nauseated, have thrown up, and have fever. My eyesight hadn't been normal either. What should I do?
Patricia on June 22, 2017:
I was bitten by a unknown spider. I did not feel the bite but the next day on my hand there was a small blister and around the blister was an almost dark red almost purple. When I put ice on it. it did the total opposite to my hand the blister expanded and also I got swelling around the area. well it got so uncomfortable so I thought that I would try and pop the blister and a thick darkish yellowish puss came out when I barely popped a hole in the blister. I drained it as much of it I could. well I cleaned it with hydren peroxcide, then I put some neosporin and some anti itch cream and then wrapped it. every half an hour I would pour some hydren peroxcide every half an hour then squeeze what I cound get out of my hand. well it is starting to look better but I had tried pouring rubbing alcohol on it. it didn't hurt when I poured it on my hand after I poured a lot on it I took a tissue and squeezed it as hard as I could. my hand is still swollen but it has been pussing it all out I have had no symptoms from the bite but would like to all types of spiders that have similar symptoms that I got
MeeB333 on June 20, 2017:
Martin Mocha: You seem to be quite knowledgeable about arachnids... Do you happen to know anything about disease transmission from spider bites, like with Bartonella &/or Borrelia(Lyme Disease)?
Sherry cleland on May 19, 2017:
I believe i got bit by a spider is there anyway i could send a pic to see if you think its a spider bite
hannah philley on May 15, 2017:
this website was confusing. i have some kind of bite on my tummy and i dont know what it is!
virginia on March 21, 2017:
I have been getting bit at night by something, I don't know what. But it is almost always on my neck! I say almost always because once I got 2 bites on my hand-all the rest on my neck. It looks like a mosquito bite, just a bump that itches. I tried a fogger--didn't help. I never see anything and it happens maybe once a week. any suggestions? It is getting where I don't want to sleep in my bed, but I like my own bed!!
ZARN loveday on January 31, 2017:
I was uo in a leader .and it calapst .I had a bit of a sore foot .I went to bed when I got up my foot was as big as afoot ball and my right foot was swollen but not like the left.there is two sets if two hols. As well as swollen it is very painful thear are tiny little blisters. I am in Newcastle nsw
dylan on January 28, 2017:
I have been biten by a spider a long time ago and I had a huge rash and I do not know what that spider was plz help
Tina on January 26, 2017:
Mines looks like the last picture what kind is that one
Alison on January 02, 2017:
I have a mark that looks similar to the 3rd picture and its giving me a lot of pain, but its not said what that mark is from...
mieke on December 21, 2016:
i woke up this morning with a really big bump tipe of thing on my arm. it might be a spider.
johnson on December 08, 2016:
This article has nothing about the Yellow Sac Spider. This is responsible for the majority of bites people endure since the spider is nocturnal & comes out when people are asleep & the lights are off. I have read many articles on this species & they will bite unprovoked. It is an aggressive spider at night. It is a hunter spider & is seeking out food. My opinion is that the spider cannot find any insects in my home & even though human blood is not something they ingest, the warmth of our bodies suggests that it might be nutrition, so they bite you. I have had Terminix in my home 5 times this year complaining about this species & despite their intentions, I am still getting bitten. The bites occur mostly on my neck , head & upper chest. Always where the blanket stops & skin is exposed. Funny thing that I never get bitten on my arms, hands or other places. Once in a while I will have a bite on my butt or stomach but it is rare. I think I have to move into a brand new home & make sure it is caulked to the max, because I have had these bites for 50 years plus now.
cattywampus on November 01, 2016:
Lots of good information but really impressed how one person worked in a stab at Donald Trump. Very clever.
Ema on October 17, 2016:
I just noticed two fang marks on my two year olds foot there is two bumps about an inch away from the two fang marks but he hasn't shown any reaction to it what could it be
Jacelyn Farwent on October 03, 2016:
I have spiders in my room, but they're daddy long legs, which are pretty much harmless, yet I have two spider bites!! What is the explanation of this?
sdwood on October 03, 2016:
spiders usually access the bed via bedskirts.
kathy atkinson on September 21, 2016:
my 2 year old grandson got bitten,mark in the middle of it,looks like a bee sting,but not the redest around it looks like it is getting bigger any help with this,thank you
Eve on September 15, 2016:
My 13 yr old daughter wakes up with bites on her legs and hands. She is in her bed. I seriously did my homework on bedbug hunting, and found no signs of bedbugs at all- I even go in her room at around 1a.m. To see if I can see something, yet there's nothing. I have 2 other kids in their rooms. They have no bites at all. My husband and I have no bites.
We think it may be spiders. We do have brown spiders in our house. My question is ... Has anyone had any experience in spiders biting you while you sleep? My husband sprayed bug spray around her bed and window, the next morning my daughter found a dead brown fuzzy looking about a little bigger than a dime size spider, on her bed! yet she had 3 new bites that night. THankYoU for reading anyway. If someone has any suggestions or ideas please write back! Thank you
Cleveland Brown on September 14, 2016:
OOOO look at Martin Mocha he/she uses the scientific name for spiders. he/she must know what he/she is talking about. And don't vote for either Clinton or Trump. Vote Gary Johnson! But I digress. This statement you made is not realistic.
"Rule of thumb, to anyone out there on the internet is, NEVER allow yourself to be bitten by any spider period"
It's kind of like saying rule of thumb, to anyone out there living in the mid-west, NEVER allow yourself to be sucked up by a tornado.
martin mocha on August 23, 2016:
was so shocked by some of the incredibly ignorant comments I stumbled across while reading various Spider bite articles I felt I had to respond to the most moronic statement from somebody calling themselves "Mountain Lion" that "no spider can kill a human” which is tantamount to stating no human has ever killed an animal or that the Sea Wasp jelly fish, Chironex Fleckeri, is as harmless as a bowl of jello:-)
From Latrodectus (Black Widows) to Phoneutria (Brazilian Wandering spiders) to Atrax robustus (Sydney Funnel Web), Loxosceles and so forth, there is ample, readily available documentation detailing scores of human fatalities attributable to various species over the decades as mentioned above. Various Phoneutria sp. for instance, are considered to possess the most virulent spider neurotoxin yet measured in a lab and fortunately for human victims, the Phoneutria spiders (mainly P. fera and P. nigriventer) are very careful with how much venom they inject unlike the primitive Mygalomorph spiders i.e., the Sydney Funnel web and still, there have been documented human fatalities from the Phoneutria bite (see Wolfgang Bucheral’s studies in his book "Venomous Animals and their Venoms Vol. III”) among the more notable.
If spiders like Phoneutria injected a full load per every chance encounter with humans, their bite could result in a possible fatality every time if antivenin was not available. Lastly, as per some of the “chats” and internet comments I have read that blabber on touting how “harmless” most North American spiders are, I say NEVER assume a spider is "harmless" which is one of the most absurd fallacies promoted by clueless morons. For instance, Dolomedes tenebrosus, which is abundant in my area of New Hampshire, certainly isn't known to possess a venom toxic enough to cause substantial damage to humans, however; the Dolomedes or Lycosides (Wolf spiders) can not only inflict a painful bite, but depending on a persons immune system, possible allergies and where the bite occurs, almost anything is possible.
I know a roof contractor who suffered a horrendous bite reaction from a large Dolomedes tenebrosus that bit him while he was nailing in shingles on a roof job. He told me he accidentally trapped the spider and it bit him twice on his index finger than ran off. Not only did he suffer immediate intense pain due to the mechanical laceration from its chelicerae, within a few hours, the local bite area developed into a severe necrotic lesion accompanied by systemic effects such as nausea and chills. Even taking into consideration, this man might have had either a compromised immune system or obscure allergy/sensitivity to arachnid venom, never the less, it strikingly illustrates the potential danger of any spider bite.
Rule of thumb, to anyone out there on the internet is, NEVER allow yourself to be bitten by any spider period, its simple common sense unless somebody is a masochist. The only thing more reckless would be to vote for Donald Trump:-)
Becky on July 29, 2016:
I'm pretty sure I was bitten by a hobo spider the other day. There are 2 little holes (fang marks) on my ankle and two red lesions, 6" and 12" further up my leg, which I now believe are the results of the venom from each fang. Has anyone ever heard of this? Only other symptom was severe sweating at times over the past two days. Of course, I work tomorrow (Friday) & Monday, so it might be 4 more days till i can see my doctor. Ugh!
Sue on June 26, 2016:
Kacie please go see a doctor! Me and my daughter both have been bitten by spiders (within months of eachother) and it got seriously infected. The area was hot to the touch, red and painful. It became infected and gross. We were given a shot and antibiotics. We both have a small scars. Please get it looked at! Best of luck for a speedy recovery.
Kacie on June 16, 2016:
I was bitten by a tiny little black spider on my left breast and its been itching all day and its red and has a bump where the bite actually took place its scary i thought it was breast cancer but its not i dont know what to put on it plz help me if u can ..anybody
Ben on January 29, 2015:
I recently had shomteing similar happen to me except my bed WAS actually full of spiders. I was about to go to sleep one night, when I saw a few tiny spiders on my blanket. I got up and looked at the foot of the bed and there were several dozen more. Then my eyes moved to the basket of freshly cleaned and folded laundry, and guess what...teaming with tiny spiders. I'm pretty sure an egg sac of baby spiders had just hatched ON my bed. Now usually, I hate killing spiders. I will take them outside or just leave them, but there were 100 baby spiders crawling all over my bed, and I wanted to go to sleep. So I spent the next hour and a half on a spider killing rampage with some tissues. I then spent the night on my futon in the next room, and washed my sheets and vacuumed very thoroughly in the morning. It was super traumatic.
bokang on January 07, 2014:
The spider has biten me on my left eye and I don't feel any pain but I feel like am sweatin and I feel am becoming awesome and having energy