Itchy, raised bumps caused by hives can look different on medium and dark skin tones. Instead of pink, they may be the same color as the skin. Hives is a common condition that causes itchy ...

Medically reviewed by Jenny Sweigard, MD A "mono rash" describes a rash that can sometimes occur with infectious ...

When he was in training as a dermatology resident more than 20 years ago, he was in the ER when a patient with dark skin came into the intensive care unit with a severe rash caused by a rare ...

However, some contagious infections can cause hives. Hives, or urticaria, causes welts on the skin. It is a type of itchy rash. While the rash itself is not contagious, the underlying cause may be.

Aquagenic urticaria is a rare condition where people have an allergic skin reaction to water. The reaction typically involves hives and bumps and can occur as often as several times a day.