Heat rash, also known as prickly heat or sweat rash, is a common name for a skin condition called miliaria. This is a rash ...

Heat rash — also known as prickly heat, summer rash, or wildfire rash — occurs when the sweat gland ducts become blocked with sweat. Cooling or gently patting the rash may provide some relief.

Heat rashes, also known as miliaria, occur when the sweat glands and ducts become blocked. This leads to sweat-filled bumps under the skin, which can cause pain, itching, and inflammation.