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Armpit Rash

Armpit Rash: Causes, Treatment and Prevention

In this comprehensive guide by Manhattan Medical Arts, we will shed light on a common yet often bothersome dermatological issue: the armpit rash.

The armpit, a sensitive and often overlooked area of our bodies, can become a source of discomfort when rashes take residence. From the irritating itch to the unsettling redness, armpit rashes can vary in their origins and intensities. Let’s explore their diverse causes, the array of symptoms they present, and most importantly, effective ways to treat and prevent them.

Whether you’re seeking home remedies, over-the-counter solutions, or insights on when to seek professional medical advice, our guide has got you covered. 

What is an Armpit Rash?

An armpit rash, also known as axillary rash, is a skin condition characterized by redness, irritation, and discomfort in the armpit area. The skin in this region is particularly sensitive due to the presence of sweat glands, hair follicles, and friction from clothing.

Armpit rashes can range from mild to severe and may be accompanied by itching, burning, or even pain. Identifying the underlying cause of the rash is crucial for effective treatment and prevention.

Types of Armpit Rash

There are various types of armpit rashes, each with its own distinct characteristics:

  • Contact Dermatitis:
    This type of rash occurs when the skin comes into contact with irritants or allergens, leading to redness, itching, and sometimes blisters. Common culprits include perfumes, deodorants, fabrics, and certain metals.
  • Fungal Infections:
    Fungi thrive in warm, moist areas, making the armpits a prime location for infections like candidiasis and tinea corporis. These infections cause red, itchy, and sometimes scaly rashes.
  • Heat Rash (Miliaria):
    Excessive sweating, especially in hot and humid conditions, can block sweat ducts, leading to heat rash. This results in small red bumps and discomfort.
  • Intertrigo:
    This rash occurs when skin folds rub against each other, creating a warm, moist environment ideal for bacterial and fungal growth. It leads to redness, itching, and sometimes pain.
  • Psoriasis:
    In some cases, psoriasis can affect the armpit area, causing silvery scales and red patches. It may be accompanied by itching and discomfort.

Armpit Rash Causes

The emergence of an armpit rash can be attributed to a multitude of factors, each with its own set of triggers. Understanding the underlying causes is immensely important in not only addressing the current rash but also in preventing its recurrence.

The most common armpit rash causes include:

  1. Poor Hygiene: Neglecting proper hygiene practices, such as infrequent washing or inadequate drying of the armpit area, can create an environment ripe for bacterial and fungal growth. These microorganisms can trigger skin irritation and rashes.
  1. Allergens: Skin contact with allergenic substances, ranging from fragrances and dyes in laundry detergents to certain fabrics, can incite allergic reactions. The result is often redness, itching, and the onset of an armpit rash.
  1. Excessive Sweating: The armpits are notorious for their propensity to sweat, which can exacerbate skin issues. Prolonged moisture, especially in warm conditions, can lead to friction and maceration, creating an ideal breeding ground for rashes.
  1. Fungal and Bacterial Infections: Fungi and bacteria thrive in warm, humid environments, making the armpits susceptible to infections such as candidiasis (yeast infection) and tinea corporis (ringworm). These infections cause itching, redness, and sometimes even pustules.
  1. Skin Conditions: Individuals with pre-existing skin conditions like eczema or psoriasis may find these conditions extending to the armpit area, causing discomfort and rash development.
  1. Friction and Irritation: The close proximity of skin folds and the friction caused by movement can lead to a condition called intertrigo. This condition manifests as red, inflamed areas that are susceptible to bacterial or fungal colonization.
  1. Deodorants and Antiperspirants: While these products help combat body odor, some ingredients can irritate sensitive skin and trigger allergic reactions, culminating in armpit rashes.

Symptoms of Armpit Rash

The symptoms of armpit rash vary depending on their underlying causes, but they commonly include:

  • Redness and inflammation
  • Itching or burning sensation
  • Pain or discomfort
  • Bumps, blisters, or pustules
  • Peeling or flaking skin
  • Unpleasant odor

How To Get Rid of an Armpit Rash?

Being able to effectively treat armpit rash depends on the underlying cause of the rash. Listed below are several approaches that can help you learn how to heal an armpit rash:

Home Remedies For Armpit Rashes:

  • Keep the area clean and dry.
  • Avoid harsh soaps and opt for mild, hypoallergenic options.
  • Apply cool compresses to reduce inflammation.
  • Use natural remedies like aloe vera or coconut oil for soothing relief.

Over-the-Counter Treatments:

  • Antihistamine creams can help with itching.
  • Hydrocortisone creams can reduce inflammation and redness.
  • Antifungal creams combat fungal infections.

Prescription Medications:

  • For severe cases, a doctor might prescribe stronger creams or ointments.
  • Oral antibiotics or antifungal medications may be necessary for infections.

How to Prevent Armpit Rashes?

Prevention is the key to maintaining healthy and rash-free armpits. With the right practices and lifestyle adjustments, you can significantly reduce the risk of developing armpit rashes.

Here’s a guide to help you keep your underarm skin comfortable and free of rashes:

Maintain Good Hygiene: Regular cleansing of the armpit area is essential. Use a mild, hypoallergenic soap and warm water to gently clean the skin. Pat the area dry thoroughly afterward, as excess moisture can contribute to rash formation.

Choose Skin-Friendly Products: Opt for deodorants and antiperspirants that are labeled as fragrance-free and hypoallergenic. Avoid products containing harsh chemicals, dyes, or alcohol, as these can cause skin irritation.

Wear Breathable Fabrics: Natural fabrics like cotton allow better air circulation and help wick away moisture, reducing the risk of friction-induced rashes. Choose loose-fitting clothing to minimize rubbing and irritation.

Keep Armpits Dry: Moisture can contribute to the growth of bacteria and fungi, leading to rashes. After exercising or sweating, make sure to dry your armpits thoroughly with a clean towel.

Use Absorbent Powders: Applying talcum powder or cornstarch can help absorb excess moisture and reduce friction in the armpit area, thus preventing rash development.

Trim Armpit Hair: Long armpit hair can trap moisture and create an environment conducive to bacterial growth. Trimming or shaving the hair can help keep the area dry and reduce the risk of rashes.

Change Clothes Promptly: After activities that induce sweating, change into clean, dry clothes as soon as possible. This prevents prolonged exposure to sweat and moisture.

Stay Hydrated: Adequate hydration helps regulate body temperature and keeps the skin hydrated, reducing the likelihood of dry, irritated skin.

Regularly Exfoliate: Gently exfoliating the armpit area can help remove dead skin cells and prevent clogged pores, reducing the risk of rash development.

Monitor for Allergies: Be attentive to any products or fabrics that seem to trigger allergic reactions. If you notice redness, itching, or discomfort after using a specific product, make sure to discontinue its use right away and opt for an alternative instead.

When To See a Doctor

Consult our medical experts at Manhattan Medical Arts if:

  • The rash is severe, painful, or spreading rapidly.
  • Home remedies and over-the-counter treatments don’t provide relief.
  • You experience fever, chills, or other signs of infection.
  • The rash is interfering with your daily activities.


Can certain fabrics cause armpit rashes?

Yes, some fabrics can exacerbate armpit rashes, especially if they don’t allow proper air circulation. Synthetic materials like polyester can trap moisture and heat, leading to friction and irritation. Opt for breathable fabrics like cotton to reduce the risk of rashes.

Are armpit rashes contagious?

In most cases, armpit rashes are not contagious themselves. However, if the rash is caused by a fungal or bacterial infection, direct skin-to-skin contact could potentially spread the infection to others.

Can stress cause armpit rashes?

Stress can exacerbate existing skin conditions like eczema, which might lead to armpit rashes. Stress itself may not directly cause rashes, but managing stress through relaxation techniques could help prevent flare-ups.

– Disclaimer –
This blog is for informational & educational purposes only, and does not intend to substitute any professional medical advice or consultation. For any health related concerns, please consult with your physician, or call 911.

Medically Reviewed

Last reviewed by Dr. Syra Hanif, M.D. on 08/21/2023

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  • About The Author

    Dr. Syra Hanif M.D.

    Board Certified Primary Care Physician

Dr. Syra Hanif is a board-certified Primary Care Physician (PCP) dedicated to providing compassionate, patient-centered healthcare.

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