Angioedema is an allergic reaction in the deep layers of the skin.
In angioedema, large welts (wheals) develop under the skin near the eyes,
mouth, hands, feet, or in the throat and tongue.
Angioedema may appear as a reaction to a substance (allergen).
Allergens include medicines, foods, insect bites, animal dander, and pollen.
Angioedema welts also may appear during changes in temperature or emotional
stress, or after an infection or illness.
Most cases of angioedema will go away within a few days without
treatment. However, swelling in the throat can interfere with breathing and may
be life-threatening. Angioedema also may be a sign of a more serious allergic
reaction (anaphylaxis) that requires emergency care. Since angioedema can
get worse quickly, a person with this condition should be evaluated by a doctor.
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & Adam Husney, MD - Family Medicine & H. Michael O'Connor, MD - Emergency Medicine
The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.