URL of this page: //www.nlm.nih.gov/medlineplus/ency/imagepages/2480.htm

Hives (urticaria) on the arm

Hives (urticaria) on the arm

Overview

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.

Update Date 5/10/2014