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Doctor insights on: Why Do Mosquito Bites Become Large Red Lumps Under The Skin After You Scratch Them

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Why do mosquito bites become large red lumps under the skin after you scratch them?

Why do mosquito bites become large red lumps under the skin after you scratch them?

Histamine: Scratching the skin releases histamine the bodies itch and swelling chemical. Its release leads to redness and swelling. ...Read more

Mosquito Bite (Definition)

Mosquito bites usually are not very visible on skin unless there is an allergic reaction or an infection following the bite. Allergic reaction will cause a redness white an infection may ...Read more


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My daughter had what i thought at first to be a simple mosquito bite that has turned into a big red spot on her inner thigh with a lump under the skin?

My daughter had what i thought at first to be a simple mosquito bite that has turned into a big red spot on her inner thigh with a lump under the skin?

Insect Bite...!!!: Dr. J. Ferguson advised warm compress, dr. N. Munmeh- cold; confusing?

Any insect bite clean with soap water, if itchy, bumpy: cold compress 1st few hours, hydrocortisone; can give oral benadryl: to reduce allergic response.

If after 1-2 days getting even bigger, deeper: warm compress; if not better in couple of days- see her pediatrician to rule out possible infection and treatment if needed. ...Read more

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Why did my mosquito bite turn into a hard lump under the skin on the top of my leg?

Why did my mosquito bite turn into a hard lump under the skin on the top of my leg?

Not sure: An extreme allergic response could cause a large welt, and it could last a couple of days. If this is very old, though, it is possible it wasn't a mosquito but some other insect and it left a stinger inside you. If painful, it could be infected. You might want to have it examined to see if there is pus that needs to be released. Meanwhile, apply warm compresses for 15 mins 4x daily. ...Read more

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Whenever my cat scratches me, it itches, turns red and swollen, and the skin becomes raised (similar to a mosquito bite). Why is this? Am I allergic?

Whenever my cat scratches me, it itches, turns red and swollen, and the skin becomes raised (similar to a mosquito bite). Why is this? Am I allergic?

Allergic to cat: If this happens only when you are scratched by the cat and nothing else, then it is likely an allergic reaction not unlike testing you with skin prick test. Do you have nasal and eye symptoms when you are in contact with a cat.
By the way, cat scratch is not totally innocuous and may lead to a condition known as Cat Scratch Disease. ...Read more

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Wife has got bad skin allergy since yesterday. Large red spots (as huge mosquito bites). Avil inj helped last night. Why so? Possible causes?

Wife has got bad skin allergy since yesterday. Large red spots (as huge mosquito bites). Avil inj helped last night. Why so? Possible causes?

Hives: Cause food allergy- seafood, chocolate, peanuts, strawberries. Other causes medications either prescription or o/c. Could also be reqction to infection. Suppress with antihistamines and look for cause. If extensive and persistent see dermatologist or allergist for workup. ...Read more

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Ive 2 bumps under the skin,(leg) painless and 1 cm, looks like mosquito bites. I had one suddenly for a week, and the second within two days, how??!

Ive 2 bumps under the skin,(leg) painless and 1 cm, looks like mosquito bites. I had one suddenly for a week, and the second within two days, how??!

Skin bumps: hello, without access to a picture or being able to visualize this lesion, it sounds as thought this could be a flea bite if you have animals or bed bug bite if you recently stayed in a hotel. You can treat both with OTC cortisone cream like cortoderm cream or any anti-histamine cream at all. If it progresses please see a doctor to evaluate..thanks ...Read more

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I have just returned from corfu.i had mosquito bites,not itchy little red dots. Now i started with white lumps, itchy, now red, delayed reaction? Tia

I have just returned from corfu.i had mosquito bites,not itchy little red dots. Now i started with white lumps, itchy, now red, delayed reaction? Tia

It's possible ...: ...but I think you first have to question whether the "itchy little red dots" were actually mosquito bites. Other kinds of bug bites, heat rash (miliaria) or even swimmer's itch caused by an allergic reaction to a waterborne parasite can produce red or white bumps. Use OTC cortisone cream for a day or two. If rash is progressing/not improving, seek medical eval. Good wishes:) ...Read more

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Skin eruptions causes redness after itching,usually after dinner, subsides in 30min,looks like multiple mosquito bites,frequent when constipative ?

Skin eruptions causes redness after itching,usually after dinner, subsides in 30min,looks like multiple mosquito bites,frequent when constipative ?

Urticaria: This sounds like an allergic process- urticaria, where you can have hives after some stimulus. It's possibly triggered by something u eat or are exposed to. Sometimes no actual cause can be found -but it would be a very good idea to see an allergist who can help you. A good doctor might also question u to see EXACTLY what might be causing this. Keep a diary of symptoms to find a relationship. ...Read more

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Suspected bug burrowing under the skin, looks like mosquito bite, moved 2" up my leg in 8hrs, can feel tearing bites in direction of movement. Help!?

Suspected bug burrowing under the skin, looks like mosquito bite, moved 2" up my leg in 8hrs, can feel tearing bites in direction of movement. Help!?

Larva currens?: Larva currens is an itchy skin condition caused by a parasite called strongyloides stercoralis. It is notable for the itchy rash that moves fairly quickly (sometimes inches per hour) under the skin. Although mostly found in tropical and sub-tropical countries, it can also occur in the southeastern us. You need to be seen by a dermatologist or infectious disease doctor asap. ...Read more

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What could red, raised patch of bumps on chest that feel like mosquito bites with surrounding skin turning black be?

What could red, raised patch of bumps on chest that feel like mosquito bites with surrounding skin turning black be?

Many possibilities: Including infection, insect bites, contact dermatitis, and others. Without a full history and ability to examine these it is impossible to diagnose. Go see a primary care physician or a dermatologist. ...Read more

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Dark red hickey-like marks on my skin that are itchy and partially raised but feels like it's the size of an agitated mosquito bite not always circula?

Dark red hickey-like marks on my skin that are itchy and partially raised but feels like it's the size of an agitated mosquito bite not always circula?

Hives or bites: Itchy red bumps on your neck may be hives from an allergy to something internal or something which contacts your neck. Insect bites are possible if the bumps last longer than 24 hours. Benadryl(causes drowsiness) or Claritin (loratadine) may help. Cortisone type cream may also offer relief. ...Read more

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Good day. My son has what looks like a bad mosquito bite or blocked pore on his nose which is red and hot and the skin on and around it is starting to?

Good day. My son has what looks like a bad mosquito bite or blocked pore on his nose which is red and hot and the skin on and around it is starting to?

Infected? : It sounds like he may have an infected bug bite or inflamatory be pustule.
He can try applying warm compresses, but if it worsens or doesn’t improve, please have MD evaluate.

Best of luck ...Read more

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I have skin irritation, which looks like red patches or inflamed follicles. The itch is much like a mosquito bite. What is it and what can I get OTC?

I have skin irritation, which looks like red patches or inflamed follicles.  The itch is much like a mosquito bite.  What is it and what can I get OTC?

It isn't possible to: diagnose the cause of your skin condition with the available information. You can go on Healthtap Prime where they can visualize the lesions with cell phone camera. for more accurate assessment. Benadryl (diphenhydramine) may help to reduce itching. It is over the counter but can sometimes be sedating. Take care. ...Read more

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What are the best antibiotics for a mosquito bite which developed into small area of red swollen tender skin??

The question: is do you need an antibiotics or topical anti-inflammatory or antihistamine. Antibiotics may be indicated only in the presence of secondary infection. Skin infections may respond to many different antibiotics especially the Penicillins, 1st& 2nd generation cephalosporins, macrolides, teteracycline, Clindamycins............ ...Read more

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I have a lump on my face that looks like a mosquito bite, but it doesn't itch, it just stings slightly and is red but not swollen. I tryed popping it ?

I have a lump on my face that looks like a mosquito bite, but it doesn't itch, it just stings slightly and is red but not swollen. I tryed popping it ?

Spider bite?: It may be from a spider bite. If it gets worse , be sure to consult your doctor. Spider bite often gets infection and rapid spread so don't delay in getting it checked out. (since there are other potential causes as well) ...Read more

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I have a bite on the back of my knee that has been there for a week. It has a small bump that looks like a mosquito bite but the skin is red around it?

I have a bite on the back of my knee that has been there for a week. It has a small bump that looks like a mosquito bite but the skin is red around it?

Likely infection: An insect bite that is red is likely infected which commonly happens because the skin now had an opening to the outside world. This is called cellulitis. Antibiotic ointment on it twice a day and keeping it clean can help it heal, and seeing a doctor if it gets more painful, redder, or swollen. ...Read more

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Have a raised bump that looks like a mosquito bite. It's skin coloured and raised, surrounded by red skin. It's very itchy. Can it be a flea bite?

That is possible: But hard to diagnose without more info and an exam of the lesion. If you get more, see a doctor. If it goes away or you find critters on your pet, spray spray spray. ...Read more

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My son 9 months old has very sensitive skin. Every mosquito bites seems to have visible red swollen marks. After few days, blisters shows.

My son 9 months old has very sensitive skin. Every mosquito bites seems to have visible red swollen marks. After few days, blisters shows.

Common: The best answer is to protect your baby from the mosquitos. If they come into your home, consider mosquito netting. Protective clothing, as well as bug repellents may also be helpful, although we don't ususually like to use the repellents in young children-if malaria or other mosquito borne illnesses are of concern where you live, talk with his doctor. ...Read more

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After a week of Benadryl (diphenhydramine) for my swollen and red mosquito bites, a hard circular lump has formed under both bites. What can I do to get rid of them?

After a week of Benadryl (diphenhydramine) for my swollen and red mosquito bites, a hard circular lump has formed under both bites. What can I do to get rid of them?

Cortisone cream: Best not to use topical Benadryl (diphenhydramine) as it is a potent sensitizer and many will develop an allergic reaction from it. Topical cortisone creams work best. The redness and lump should gradually fade.
Some insect bites persists for years and are called dermatofibromas. ...Read more

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I got 1 red bumpy swollen & itchy spot that look like a mosquito bite but then got a white head & next thing I knew I got 8 more on my legs. Help!?

I got 1 red  bumpy swollen & itchy spot that look like a mosquito bite  but then got a white head  & next thing I knew I got 8 more on my legs. Help!?

Ant bites?: Looks like they could be fire ant bites (recall if you were bare footed outdoors)
You may take OTC Loratadine once a day for the itching and apply Caladryl or Calamine to the foot, as well as cold compresses. ...Read more