What Is Heat Rash? What Is Prickly Heat? What Causes Heat Rash?

Heat rash, also known as prickly heat, sweat rash and miliaria, is an itchy, red skin rash that often causes a stinging or prickling sensation. It is common in infants but can affect adults too, especially during hot, humid weather. Heat rash develops when sweat ducts become blocked and perspiration is trapped under the skin. This causes irritation and results in the rash…