Hives (urticaria) on the arm

Hives (urticaria) on the arm
Hives (urticaria) on the arm
Hives (urticaria) are raised, red, itchy welts, seen here on the arm. The majority of urticaria develop as a result of allergic reactions. Occasionally, they may be associated with autoimmune diseases, infections (parasitosis), drugs, malignancy, or other causes.