Red, itchy lesions caused by a variety of ingested medicines and foods.

Hives (Urticaria) represent an allergic reaction resulting in a “wheal” which is a red, itchy lesion that can vary from a few millimeters to several centimeters in diameter. Each weal may last a few minutes or several hours, and may change shape. Typically, medicines such as antibiotics, or food, including even tiny amounts of fish, eggs, nuts or chocolate, are responsible. It depends on previous exposure to the material, and the development of an immune reaction to it.