An armpit rash can be uncomfortable or even painful.

Often, the cause is mysterious but no cause for concern.

But sometimes, an armpit rash is severe enough to require a trip to the doctor.

What Is Armpit Rash? Causes, Treatment, and Prevention

Learn what causes armpit rash, how its diagnosed, and treatment options.

Where Does an Armpit Rash Typically Develop?

Armpit rash can develop in the armpits themselves or in the skin around the underarm area.

Friction-Dermatitis

It can be wet or dry, and it may ooze fluids.

These factors set the stage for a range of possible rashes.

What Causes an Armpit Rash?

Friction-Dermatitis

Also known as chafing, the friction created by skin rubbing on skin or clothing can cause irritation.

Contact Dermatitis

There are two types of contact dermatitis: irritant contact dermatitis and allergic contact dermatitis.

[2]

Hidradenitis Suppurativa

Hidradenitis suppurativais a skin condition that features painful lumps in your skin.

Contact-Dermatitis

Eczemaloves skin folds, and armpits are one spot we might see it, says Durham.

Contact Dermatitis

[11]

3.

Fungal Infection

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4.

Fungal-Infection

Folliculitis

6.

Atopic Dermatitis (Eczema)

[13]

7.

Inverse Psoriasis

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Is an Armpit Rash Serious?

Hidradenitis-Suppurativa

Many underarm rashes are harmless (though often uncomfortable).

[15]

Do I Need a Diagnosis for Armpit Rash?

An armpit rash is pretty unmistakable.

Folliculitis

These include instances where youve identified the cause, such as chafing or allergies.

[16]

How to Treat an Armpit Rash

Many armpit rashes can be treated at home.

Eczema

First, wash with an antibacterial soap and gently exfoliate with a body brush, recommends Durham.

Use the brush one to three times per week, depending on sweat and activity level.

The Takeaway

Mohiba Tareen, MD, is a nationally acclaimed board-certified dermatologist.

Inverse-Psoriasis

She practices medical, surgical, and cosmetic dermatology at her Minnesota medical practice, Tareen Dermatology.

Cosmetically, Tareen believes in subtle and natural aesthetic enhancements.

She was previously an assistant editor atPreventionwhere she wrote monthly science-based beauty news items and feature stories.

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