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There are many methods for treating heat rash at home, including at-home remedies, self-soothing treatments, and OTC medicine. Whatever you choose, aim to cool and soothe the skin and reduce friction.

Start with over-the-counter treatments first, like a gentle moisturizer for dry skin, Hu says. And if the rash itches, use an over-the-counter cortisone cream for a week. But, after that ...