Heat rash is a skin condition that develops in hot, humid environments. It causes small discolored or fluid-filled blisters to develop in the folds of your skin or areas where clothing rubs the skin.

Medically reviewed by Daniel More, MD Pictures of hives, also known as urticaria, can help you to identify these raised, red, itchy bumps or welts. Causes include stress, infections, food or latex ...

Whether your rash is itchy, bumpy, red or blistering, it's important to know what's causing it — and how serious it is. But ...

Have you ever wondered why some people struggle with heat rash every summer while others appear to navigate the hot weather with no issues at all? We asked a dermatologist to explain what causes ...