Someone with sensitive skin or another skin condition is also at a potentially greater risk. Those with hyperhidrosis, or excessive sweating, are more likely to develop the rash. Likewise, there are factors that can make someone more prone to get heat rash. MORE FROM MICHIGAN: Sign up for our weekly newsletter Additionally, using an anti-perspirant deodorant in the underarms but also in other skin folds (groin folds, thighs, under breasts, etc.) can be helpful to decrease sweating. She says air conditioning, wearing loose fitting clothing, and changing out of sweaty clothes frequently all can help avert blocked sweat glands. Keeping the skin cool and avoiding hot, humid conditions is beneficial in keeping heat rash at bay. Mancuso, a clinical lecturer in dermatology at Michigan Medicine, says this condition is also seen in patients who are sick in the hospital and lay on their back for extended periods of time. It’s important to note that heat rash can be brought on in an indoor setting as well. The inflammation can create an itching or burning sensation, but heat rash doesn’t always present with these symptoms. When sweat glands or pores get clogged, sweat is trapped underneath the skin. This includes the underarms and groin, and places where clothing causes friction, particularly on the back.
The rash is caused by heat and tends to present around the hair follicles in areas with increased sweating or friction, like in skin folds. But unlike sunburn, heat rash can cause small, itchy, fluid-filled bumps on the skin, and it can be skin that was never even exposed to sunlight. Similar to sunburn, a heat rash, also known as ‘prickly heat’ or miliaria, is a red rash on the skin. LISTEN UP: Add the new Michigan Medicine News Break to your Alexa-enabled device, or subscribe to our daily updates on iTunes, Google Play and Stitcher. With temperatures rising and sun shining, you could get a heat rash. If you spend the day under the sun and notice you’re turning red, sunburn might not be the culprit, says dermatologist Jennifer Mancuso, M.D.
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