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Doctor insights on: Staph Sore That Looks Like A Spider Bite

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Dr. Neal Kraus
534 Doctors shared insights

Staphylococcal Infection (Definition)

This is an infection caused by Staphylococcus aureus - and it often is quite dangerous because the organism, the 'germ' has alot of virulence to it... it's very nasty in other words. You can see an ID doc to find out more about Staph infections, since they are experts in diagnosing and treating ...Read more


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Do I see a dr for infection/staph 4 a spider bite? It round, swollen, green and I'm running a low grade temp with cold sweats?

100 percent: Incidently, many infections that are thought to be spider bites may be wounds growing resistant bacteria like MRSA.....better to be on an oral antibiotic then topical... ...Read more

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I have a sore on my right leg and it hurts. My mom says it looks like a spider bite. It is white around the center and red around the white. Help?

I have a sore on my right leg and it hurts. My mom says it looks like a spider bite. It is white around the center and red around the white. Help?

Bite?: Could be a spider bite and it should resolve in about 7-10 days (get better day by day). Your description could also be a boil. Is it raised and dies it appear to get larger day by day? Boils are skin abscesses. I would get it checked by your pcp to remove any doubt. Both are easily treated. ...Read more

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Husband, Lucius has asthma. He has large sore on leg. Looks like spider bite. He's using inhaler 3 to 4 times a day. Not sure what to do.

Husband, Lucius has asthma. He has large sore on leg. Looks like spider bite. He's using inhaler 3 to 4 times a day. Not sure what to do.

See a doctor: If the sore is not healing and/ or is draining or painful a doctor visit is needed. The inhaler use has no connection to the sore. ...Read more

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My son has a pimple like sore on the back of his arm resembles a spider bite looks like it has a yellow kind of puss inside and it very hard?

My son has a pimple like sore on the back of his arm resembles a spider bite looks like it has a yellow kind of puss inside and it very hard?

Abscess: It may have started out as a bite but it know sounds like infection or an abscess and should be drained and likely treated with antibiotics. All the best. ...Read more

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My fiancé had what looks to be a spider bite, (2 holes, red, itchy, swollen, blistered and sore) should he pop the blisters and the liquid out!?

Wrong question: Spider bites are rare and unlikely to produce what you describe. SO WHAT IS THIS?? Consider a professional opinion, preferably by a dermatologist. ...Read more

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May this be a brown recluse spider bite. Started out looking like a boil then it went down. The place then got real red, painfull and puss came out now it is red swollen and looks and feels like the tissue around it is kinda ruff and tender at the same t

May this be a brown recluse spider bite. Started out looking like a boil then it went down. The place then got real red, painfull and puss came out now it is red swollen and looks and feels like the tissue around it is kinda ruff and tender at the same t

I: I can't diagnose your lesion. You indicated that you thought you saw a fang puncture mark. The brown recluse is actually quite small. It can be a quarter of an inch to a little over half an inch, so I am not sure that it would leave an obvious fang mark. I was bitten by a brown recluse about 3 decades ago. The bite was painless. A black eschar (scab) quickly formed and the skin around it was white and died quickly. My arm became markedly swollen, hot and red and I developed a high fever and muscular skeletal aches throughout my body. I lost a lot of tissue (skin and deeper tissue) from the site. It took over a week to get rid of my generalized symptoms and several months for my arm to heal in the area that I was bitten. I became quite ill from it.
Luckily, most people do not have this severe a reaction. Brown recluse bites can cause minor reactions or they can in rare cases be deadly. Hemotoxic venom is injected when they bite. In one study, over a third of bites led to necrosis (destruction) of the skin surrounding it. A systemic illness occurred in about 14 % of cases. However, the majority of people have no significant reaction to their bite.
I don't know if you have a boil or if it is a venoous bite or sting. Spider bites sometimes leave a black scab in the center (called an eschar) and there may lighter, or sloughing skin around that. If you develop fever, vomiting or a significant amount of skin is sloughing, the area of redness is continuing to grow larger and painful it would be appropriate to have it checked out by a medical provider.
Take care. I hope it heals quickly. ...Read more

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I have a slightly large pimple like sore on my back. It's not itchy but it is painful. Could it be from a spider bite?

I have a slightly large pimple like sore on my back. It's not itchy but it is painful. Could it be from a spider bite?

Unlikely: Most common lesion on the back as you described is a pimple or sebaceous cyst. Both of which are localized skin infections/inflammations. A spider bite could occur on back but is less likely. A spider bite could get infected or it could cause tissue necrosis as with the brown recluse spider bites. Best to have a doc look at it. ...Read more

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Sore jaw from spider bite, what to do?

Sore jaw from spider bite, what to do?

See a doc: If you are having symptoms of jaw pain from a spider bite, please follow with a physician for evaluation and management. ...Read more

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How can I tell if a sore on my arm is a pimple or a spider bite?

How can I tell if a sore on my arm is a pimple or a spider bite?

Dots: A spider bite usually has several dots in the red area. Also, the spider injects venom which causes a much larger area of redness and induration (roughness). ...Read more

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Possible spider bite? Blister on arm, area is red around the blister, arm is sore, mild discomfort. Maybe hobo spider? Go 2 ER now to reduce damage?

Possible spider bite? Blister on arm, area is red around the blister, arm is sore, mild discomfort. Maybe hobo spider? Go 2 ER now to reduce damage?

Probably not: There are hobo spiders in WA. If they ever bite at all, the result is much less severe than brown recluse. Expert opinion differs as to the existence of any bites by hobos. They are very reluctant to attack. Unless you saw and felt a bite, then took the creature for expert identification, assume it is something else. Best bet is a dermatologist. ...Read more

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Got a unknown spider bite on right breast 2 weeks ago. Got a rochepin shot and 10 days of bactrim (sulfamethoxazole and trimethoprim) now the is really sore & red, warm to touch & black?

Got a unknown spider bite on right breast 2 weeks ago. Got a rochepin shot and 10 days of bactrim (sulfamethoxazole and trimethoprim) now the is really sore & red, warm to touch & black?

Treatment failure: Symptoms of an illness that will respond to a particular antibiotic usually start to improve within a few days and certainly shouldn't get worse. Cellulitis is the condition of the skin when infected, characterized by warmth, tenderness, redness and sometimes drainage. Cellulitis that doesn't improve with oral medications often requires IV antibiotics and possibly surgical intervention. ...Read more

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Can spider bites cause cold/flu symptoms I have two huge spider bites now I have a headache, getting weak & now a minor sore throat hurts to swallow?

Can spider bites cause cold/flu symptoms I have two huge spider bites now I have a headache, getting weak & now a minor sore throat hurts to swallow?

Get medical eval: Seek medical care asap if you think a spider bit you & you have fever, severe pain (can be felt at bite site & possibly chest, back or abdomen); abdominal cramping /rigidness or ulceration of skin at site. You may need a tetanus shot (if you don't know when your last shot was or it has been > 10 years). Also medical care if you develop signs of secondary infection. ...Read more

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Spider bite 4 weeks ago still sore hot pains up and down body stabbing ankles wrists tingling tired aching head feels tight throat swollen ankles too?

Spider bite 4 weeks ago still sore hot pains up and down body stabbing ankles wrists tingling tired aching head feels tight throat swollen ankles too?

Is a spider bite?: It may not have been a spider bite. There have been many cases of skin infections caused by Methicillin Resistant Staph Aureus (MRSA). The lesion is typically described as a spider bite. What happens is this organism penetrates the skin via hair follicle and makes its way into the body. It can evade the immune system, but it can also attack with vigor. Get a blood test! ...Read more

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What is the best antibiotic for cellulitus? I'm allergic to sulfur and pcn. Spider bit me. Led to staph/cellu. Er dr gave me cleocin (clindamycin phosphate) seems to be good

What is the best antibiotic for cellulitus? I'm allergic to sulfur and pcn. Spider bit me. Led to staph/cellu. Er dr gave me cleocin (clindamycin phosphate) seems to be good

MRSA: Unless you actually saw the spider bite you this is most likely to be an MRSA boil. If the organism is sensitive, Clindamycin is an excellent choice of treatment. If you are getting better continue this for 10 to 14 days. If it recurs you may need to attempt to change nasal carriage and skin colonization. Good luck and get better. ...Read more

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4 months ago I thought my spider bite was a huge zit and tried to pop it. Now there are small marks that are tender to touch. How serious is this?

4 months ago I thought my spider bite was a huge zit and tried to pop it. Now there are small marks that are tender to touch. How serious is this?

Likely not serious.: Since the length of time is approximately 4 months, you are dealing with a more chronic issue. If you were having acute tenderness, this could be urgent. I would still see a physician--who wants to live with unnecessary pain? However, I would not consider this a serious medical emergency. ...Read more

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Other than a spider bite, what leaves deep, tender, hard to heal, tough scab, that takes weeks/months to heal?

Other than a spider bite, what leaves deep, tender, hard to heal, tough scab, that takes weeks/months to heal?

Non healing ulcer: Non healing ulcer may be from certain specific skin conditions, underlying diabetes, poor circulation and underlying skin cancer and many more. These are some common things to think of first in the differential. ...Read more

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I have a large painful bump on my outer right thigh. It feels tender and warm. I am unsure whether it's a boil or pimple or spider bite.

I have a large painful bump on my outer right thigh. It feels tender and warm. I am unsure whether it's a boil or pimple or spider bite.

See a doctor: Regrdless what it is you need to see a doctor in casr it needs drainage or debridment and of course you are going to need oral antbiotic
so go and see your doctor ...Read more

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My nephew has a spider bite on his left lower leg. It is red, swollen and tender. I'm a nurse and have some antibiotics-Is Septra (sulfamethoxazole and trimethoprim) or Keflex better?

My nephew has a spider bite on his left lower leg. It is red, swollen and tender. I'm a nurse and have some antibiotics-Is Septra (sulfamethoxazole and trimethoprim) or Keflex better?

NEITHER!!!!!!: Spider bites are RARE. He probably has something else. NO ANTIBIOTIC IS OF ANY USE FOR REACTIONS TO SPIDER VENOM!!! Unless he saw and felt the attack, then took the spider for identification, assume it is something else. Brown recluse and black widow spiders in USA are found almost exclusively in the southwest quadrant. Where are you? Ordinary spiders are completely harmless. ...Read more

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Do I have a staph infection on the inside of my lips?, they keep sticking together, red, sore and have what looks like puss on them

Do I have a staph infection on the inside of my lips?, they keep sticking together, red, sore and have what looks like puss on them

Doubt staph. Herpes?: Staph is an unlikely cause of such symptoms, and "conditions" list sore throat as well as the mouth problem. Maybe herpes if you have been exposed, i.e. kissing someone with oral herpes or oral sex on partner with genital HSV. Other viruses and allergic reactions also are possible. For sure see a doctor ASAP -- the sooner the better both for accurate diagnosis and effective treatment if herpes. ...Read more

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How long a course of antibiotics does it take to heal staph folliculitis? Widespread across pubis and crease of thighs, is itchy and a bit tender.

How long a course of antibiotics does it take to heal staph folliculitis? Widespread across pubis and crease of thighs, is itchy and a bit tender.

About 2 weeks: For most infections, antibiotics will clear it in about 2 weeks. However, if you are "colonized" with the staph bacteria, it is possible to keep re-infecting yourself in the same area. Ask your doctor about a culture taken from your nose (hey, it's where the staph lives!). You may need an antibiotic ointment to put inside your nose. ...Read more

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How is a staph sore throat normally treated?

How is a staph sore throat normally treated?

Antibiotics: Normarly these infections are treated with antibiotics. ...Read more

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Could a sore inside front of nose be from staph infection?

Could a sore inside front of nose be from staph infection?

Possibly...: It is difficult to make a proper diagnosis since I am not there to see the condition. I recommend seeing a dermatologist so that they can make a proper diagnosis and give you something to get rid of the condition or relieve symptoms. ...Read more