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Doctor insights on: Rash Under One Armpit

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What could cause a persistent itchy rash in only one armpit that has lasted for at least two months but hasn't spread?

What could cause a persistent itchy rash in only one armpit that has lasted for at least two months but hasn't spread?

ARMPIT RASH: WHY UNDER ONE ARM I DON'T KNOW. IF ITS UNDER THE ARM THAT DOES ALL THE WORK, LIKE WRITING, LIFTING, EATING, ETC., IT MAY BE A CONTACT DERMATITIS FROM SOAP, DETERGENT, STUFF YOU MAY BE PUTTING ON WITH YOUR DOMINANT HAND. BE A DETECTIVE AND IF IT DOESN'T GET BETTER, SEE DERMATOLOGIST.

Axilla (Definition)

Area of human body directly under the joint where the shoulder connects to the arm. It contains axillary vessels, brachial nerve plexus, lymph nodes & vessels, axillary ...Read more


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How does one get rid of an armpit rash?

How does one get rid of an armpit rash?

1st things 1st: You need to have a proper evaluation that will first exclude potential precipitators of the rash, such as antiperspirants, and try to find any other etiology of the rash. Thereafter, an appropriate treatment prescribed. Consequently, in order to treat the rash, a physician should evaluate it and give you appropriate treatment.

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What could causea large red armpit rash under only one arm for over3 wks?

What could causea large red armpit rash under only one arm for over3 wks?

Several: It is possible to have an infection, fungal or bacterial. You could have an allergic reaction or just a severe irritation to shaving. Some dermatitis can start in one location or be isolated to one area. If fever, pain, or drainage or weeping fluid, see ur dr. If not can try an anti fungal powder to keep dry or mild steroid cream for relief of itch, irritation.

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My boyfriend has a rash growing underneath his left armpit and is spreading to his right one. There no lumps or anything just kind of red, and he says it burns

My boyfriend has a rash growing underneath his left armpit and is spreading to his right one. There no lumps or anything just kind of red, and he says it burns

Hi.: Hi. I cannot diagnose the reason for the rash in your boyfriend’s underarm. What are possible reasons? Has he started using a new soap or deodorant that he might be reacting to? Is he wearing clothes that fit tight at the underarm and are causing friction? If either of these might be the culprit, stop using the new product or try wearing clothes that are looser near the armpit. Wearing clothes that are made of natural fabric like cotton may also be beneficial as it will allow for better ventilation. Good hygiene is also important. Ensure that the arm is dried off well after washing. If his rash does not improve with these suggestions, he could have a fungal infection. Because the underarm is moist, warm and does not get much air, it is the perfect place for a fungus to grow. He may need to see his doctor to be evaluated.

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My 3 year old son has a rash in both armpits and behind both knees. They itch. His armpit ones are spreading. What could this be?

My 3 year old son has a rash in both armpits and behind both knees. They itch. His armpit ones are spreading. What could this be?

Sounds like it: Could be eczema, a contact rash or a fungal infection. For the first 2, the treatment would be a cortisone cream and for the third an anti-fungal cream. If he is otherwise well, you could try these over-the-counter and if not better, or worsening or appears ill in any way, I would recommend seeing his pediatrician.

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I have a rash on one armpit, its little red bumps with heads and there is one bump that is very swollen even under the skin. It is painful and itchy?

I have a rash on one armpit, its little red bumps with heads and there is one bump that is very swollen even under the skin. It is painful and itchy?

This Is The Pits...: You may have the beginnings of an infection in that area. If it gets too advanced it could become a real problem that's hard to get rid of and at that point it would be called :hidradenitis suppuritiva" which means a recalcitrant infection of the armpit (s). Best to get it looked at and treated right away. It's not likely to go away on its own and that big lump is a sign of that.

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Recurring mild rash circling armpit and next to elbow. One or 2 bumps mid chest/neck. Possibly accompanied w/ congestion. Any ideas before seeing derm?

Recurring mild rash circling armpit and next to elbow. One or 2 bumps mid chest/neck. Possibly accompanied w/ congestion. Any ideas before seeing derm?

Dermatologist: This needs to be seen and a full history obtained. Guessing about it over the internet is not the best way to diagnose this. See the dermatologist, and good luck.

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I have a thick rash only on my left arm pit. What should I do? The rash is not one big rash. It is spred out in 4 different rashes & bright red.

I have a thick rash only on my left arm pit. What should I do? The rash is not one big rash. It is spred out in 4 different rashes & bright red.

Get the diagnosis: There are many types and causes of skin rashes. Several types of inflammatory conditions of the skin, allergic reactions, and sometimes bacterial, viral or fungal infections can cause rashes on the skin. Insect bites can also be the cause of a rash on the skin. Have it evaluated by a professional and get the appropriate treatment.

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Suddenly my left armpit started to have a bad odor and red rashes started to show since yesterday night. Can anyone help me?

Arm pit: You may have an infecion of your hair follicles as a result of shaving. As a result you have a red rash and bad odor. See a dermatologist because you will need antibiotic treatment.

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I have some rashes that started 3 days ago. It's around my chest area. It's like a cluster or red tiny bumps and now spread to underneath armpits?

I have some rashes that started 3 days ago. It's around my chest area. It's like a cluster or red tiny bumps and now spread to underneath armpits?

Virus: Rash of localized "red bumps... Which spread from chest to armpit", in a middle age man, is compatible with shingles. The virus follows nerve tracts, suggested by this pattern of evolution. If caught early enough, a course of medication can be prescribed by doctor to abort the advancing infection.

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What do I do about my armpit rashes? Could they be yeast?

What do I do about my armpit rashes? Could they be yeast?

Armpit rash: You're on the right track. Your armpit rash is probably not yeast, which occurs mainly under the breast creases, abdominal creases, or genital area, but by any one of a dozen common skin fungus. It is most likely to be a fungal infection. It should respond to the same cream as used for yeast, e.g., otc Clotrimazole cream 1% should do fine.

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Patchy red rashes on my neck, under my breasts and my armpits - has been like this for a number of days and are getting worse.

Patchy red rashes on my neck, under my breasts and my armpits - has been like this for a number of days and are getting worse.

See dermatologist: This requires a direct exam although I suspect that this may be from a fungal infection (monilial) especially if you are overweight and sweat a lot.

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Itchy rashes under armpit, what are possible causes and OTC treatments? I shower daily, don't shave.

Itchy rashes under armpit, what are possible causes and OTC treatments? I shower daily, don't shave.

Dermatitis vs fungal: An 'itchy' rash in the axilla (arm pit) may be a 'contact dermatitis' or a yeast/fungal infection. An otc treatment for dermatitis is Cortaid (hydrocortisone 1%) and the treatment for fungal infection is otc 'anti-fungal' e.g. Lotrimin (clotrimazole). Dermatitis may be caused by exposure to chemicals/fragrances in deodorant/anti-perspirants so a hypo-allergenic subsitute may be needed. Get seen if no better.

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There's a clump of itchy red and bumpy rashes above my armpit. There used to be a rash just like that two weeks ago but my mom told me to leave it be.

There's a clump of itchy red and bumpy rashes above my armpit. There used to be a rash just like that two weeks ago but my mom told me to leave it be.

Diagnosis: This skin condition will require visualization and a medical history at minimum to be able to diagnose correctly.

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My boyfriend would sometimes get rashes under his armpit neck and back after unprotected sex. Is it me or is it like sweat or an allergic reaction?

My boyfriend would sometimes get rashes under his armpit neck and back after unprotected sex. Is it me or is it like sweat or an allergic reaction?

Rash: This is not an allergic reaction to you. He may have deodorant that heats up with this activity. He may have a flush. He may have a cologne that heats up. Not to worry.

Dr. John Chiu
2,648 Doctors shared insights

Skin Rash (Definition)

A skin rash is a symptom in which a person has changes on part or all of his skin, such as color changes, bumps, blisters, oozing, peeling, ...Read more


Dr. Cornelia Franz
1,059 Doctors shared insights

Rash (Definition)

A rash is a change to skin condition which can affect color, appearance, or texture. It may or may not ...Read more