What Is Heat Rash? Heat rash, also known as miliaria, prickly heat which is a common condition, in which areas of the skin feel prickly or sting because of overheating. It is very itchy but it cannot be dangerous. This looks like small bumps of red skin around them. This usually happens on your body’s covered parts, such as your back, belly, arms, upper chest, groin, or armpits. And it typically gets better when your skin cools off. In dry, humid conditions, heat rash occurs most frequently. It is most…
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