Use soothing powder to dry the skin. Sometimes, especially in hot and humid climates, it can be difficult to keep heat rash-affected skin completely dry, even if you avoid exercise. In these cases, try applying a small amount of talcum powder, baby powder, or corn starch (in a pinch) to the affected area.

Heat rash (prickly heat or miliaria) is a mild inflammation of clogged sweat ducts. The rash is characterized by small, raised bumps (like coarse sandpaper) spreadevenly across small patches of skin. The rash usually goes away on it's own and resolves in hours to a few days.

A rash can develop within six hours of sun exposure, and it may last for up to three days depending on the severity of your burn. Apply a cool compress and aloe vera gel to help soothe the skin and make your rash go away faster.