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Complications
By Mayo Clinic staffHives and angioedema can cause:
- Itching
- Discomfort
In more serious cases — such as when swelling occurs inside your mouth or throat — complications can include:
- Difficulty breathing
- Loss of consciousness
- Anaphylactic shock
Anaphylactic shock (anaphylaxis) is a serious allergic reaction involving your heart or lungs. Your bronchial tubes narrow, it's difficult to breathe, and your blood pressure drops, causing dizziness and perhaps loss of consciousness or even death. Anaphylactic shock occurs rapidly, and requires immediate medical care.
- Urticaria — hives. American Academy of Dermatology. http://www.aad.org/public/publications/pamphlets/skin_urticaria.html. Accessed Oct. 22, 2008
- Allergic skin conditions. American Academy of Allergy, Asthma and Immunology. http://www.aaaai.org/patients/publicedmat/tips/allergicskinconditions.stm. Accessed Oct. 22, 2008.
- Habif TP. Urticaria and angioedema. In: Clinical Dermatology: A Color Guide to Diagnosis and Therapy. 4th ed. Philadelphia, Pa.: Mosby Inc; 2004. http://www.mdconsult.com/das/book/body/108133988-3/0/1195/29.html#4-u1.0-B0-323-01319-8..50008-X--cesec5_428. Accessed Oct. 22, 2008.
- Bingham CO III. An overview of angioedema. http://www.uptodate.com/home/index.html. Accessed Oct. 22, 2008.
- Bingham CO III. Etiology and diagnosis of urticaria. http://www.uptodate.com/home/index.html. Accessed Oct. 22, 2008.
- Bingham CO III. Treatment of urticaria. http://www.uptodate.com/home/index.html. Accessed Oct. 22, 2008.
- Simmons FER, et al. Anaphylaxis: Rapid recognition and treatment. http://www.uptodate.com/home/index.html. Accessed Oct. 30, 2008.
- Atkinson JP, et al. Pathogenesis and clinical manifestations of hereditary angioedema. http://www.uptodate.com/home/index.html. Accessed Oct. 30, 2008.
