Heat rash — also known as prickly heat ... filled with sweat to form on the skin’s surface. The bumps measure 1–2 millimeters across. It causes no itching or pain and is more common in ...
prickly, itchy, or burning sensation. Dry skin can also cause runner’s itch. Get ahead of itchy skin by wearing sweat-wicking clothing, doing a proper warm-up, and drinking plenty of water.