Medically reviewed by Daniel More, MD Pictures of hives, also known as urticaria, can help you to identify these raised, red, ...

“The term ‘rash’ generally applies to an inflammatory skin condition, so hives are a type of rash,” says Jennifer Segal, MD, ...

It’s more than fair to wonder what’s happening if you suddenly develop a skin rash, especially if they’re not a regular thing for you. But rashes happen for a range of reasons, from products ...

A PUPPP rash usually goes away on its own and doesn’t cause any scarring or lasting skin color changes. Experts don’t know what causes a PUPPP rash, but it might be linked to stretch marks.

The color of hives can vary depending on your skin tone. On dark skin tones, hives may appear darker or lighter than your natural skin tone. On light skin tones, they may appear red or pink.

Other causes of an armpit rash include a yeast infection, psoriasis, or seborrheic dermatitis. Rashes are pesky patches of irritated skin that can affect any part of your body, including your armpits.