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

The telltale itch begins subtly – perhaps a slight irritation on your arm or an uncomfortable warmth spreading across your chest. Before long, your skin erupts in patches of redness, bumps, or scales ...

When a blotchy red rash pops up on your skin, it's not easy to know exactly what the cause is. With thousands of skin diseases to choose from, deciphering your skin can be a challenge. But with skin ...