Angioedema is swelling that happens just below the surface of the skin, most often around the lips and eyes. When you have an allergic reaction, your body produces histamine, which causes blood vessels to swell. Angioedema is like hives, but with hives there are itchy red welts on the surface of your skin. Angioedema is a deeper swelling.

Both hives and angioedema are usually caused by an allergic reaction to either a food or medication. Things like pollen or insect stings can also cause angioedema. In rare cases, it may be a sign of an underlying condition, such as leukemia or Hodgkin's disease. There are two basic types of angioedema:

Angioedema can take anywhere from minutes to hours to develop. It may affect just one side of the body. In most cases, angioedema is mild. Severe angioedema can cause the throat or tongue to swell, cutting off the airway, and it can be life threatening.

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Review Date: 11/19/2016  

Reviewed By: Steven D. Ehrlich, NMD, Solutions Acupuncture, a private practice specializing in complementary and alternative medicine, Phoenix, AZ. Review provided by VeriMed Healthcare Network. Also reviewed by the A.D.A.M Editorial team.

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