An armpit rash may be due to chafing, eczema, or an infection. Learn about the types of underarm rashes, treatment options, and when to speak with a doctor.

There are different types of armpit heat rash. Some cause tiny, clear blisters, while others lead to red, itchy bumps or blisters filled with pus. Other causes of armpit rashes.

Armpits are a common place to get rashes because the skin there is thin, folds up on itself, ... Armpit rashes can caused by many conditions including allergies and certain types of infection. 1.

You can get a pimply underarm rash from being overheated. This type of rash (also called miliaria) occurs when sweat glands and ducts become obstructed by bacteria, skin cells, oil, or other debris.

Here’s how to identify your armpit rash, prevent complications, and more. ... 8 Common Types of Rashes and What They Look Like Medically Reviewed by Susan Bard, MD | June 5, 2025.

Several itchy armpit types or underarm rashes types depend on different factors. Some might require critical medical attention, and some could be cured easily by a few measures or topical treatments.

These types of armpit rashes are caused by allergic reactions and the infection may last longer than other types of armpits rashes. This can result to itchiness, redness, blisters and dryness in ...

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Typically, armpit rashes aren't dangerous, but they can certainly be uncomfortable and range from itchy to painful. If you're experiencing a persistent rash alongside other symptoms, it's best to ...

Itchy armpits are often caused by a skin condition. But certain health conditions, including some types of cancer, can cause ...

6 clues your armpits are giving you about your overall health 1. A red, itchy rash could be a sign of eczema. Simply what your armpits look like can be meaningful intel—especially if you ...

There are over 70 types of lymphoma, ... And because the underarm is prone to chafing, the rash can easily be exacerbated and spread. BSIP - Getty Images. Atopic dermatitis: ...