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Hives and Angioedema (cont.)


What Follow-up Is Needed After Treatment of Hives and Angioedema?

Take all prescribed medicines as directed except for those drugs you are instructed to take only as needed. This will reduce the possibility of the hives or swelling coming back.

Contact a health care professional or return to the hospital if you have any of the following:

  • Rash or swelling returns or gets worse
  • Difficulty or severe side effects with your medicines
  • New symptoms
  • Sores or swelling of the mouth, tongue, or throat
  • Fever or chills
  • Difficulty with breathing or swallowing
  • Vomiting or diarrhea

Is It Possible to Prevent Hives and Angioedema?

It is not always possible to prevent hives and angioedema, but you can minimize your risk. Avoid exposure to any food, medicine, animals, or physical agent that has been identified to cause your hives or angioedema.

Reducing emotional and physical stress may help. In rare cases, you may need to take antihistamines or other medicines for an extended time to prevent further hives or swelling.

What Is the Prognosis for Hives and Angioedema?

  • Hives and angioedema may be very uncomfortable but will not cause serious harm.
  • The hives will not leave scars.
  • Most people do well with treatment.
  • Hives and angioedema usually will last only a few hours to a few days. Chronic hives lasts longer than six weeks but is rare.

Where Can People Find Support Groups and Counseling for Hives and Angioedema?

Asthma and Allergy Foundation of America
1233 20th St NW, Suite 402
Washington, DC 20036

Where Can People Get More Information on Hives and Angioedema?

American Academy of Allergy, Asthma & Immunology
555 East Wells Street, Suite 1100
Milwaukee, WI 53202-3823

National Institute of Allergy and Infectious Diseases
6610 Rockledge Drive, MSC 6612
Bethesda, MD 20892-6612


Green, Thomas E. "Acute Angioedema Overview of Angioedema Treatment." Jan. 14, 2015. <>.

Wong, Henry K. "Urticaria." Dec. 7, 2015. <>.

Wong, Henry K. "Urticaria Medication." Dec. 7, 2015. <>.

Medically Reviewed by a Doctor on 9/11/2017

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Read What Your Physician is Reading on Medscape

Angioedema »

Angioedema is a subcutaneous extension of urticaria, resulting in deep swelling within subcutaneous sites.

Read More on Medscape Reference »

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