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 ...

Dermatographism is a form of pressure urticaria in which hives will form along the lines of trauma wherever the skin is scratched, rubbed, or roughly stroked. The term "dermatographism" literally ...

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.