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Allergic Reaction (cont.)

What Is the Prognosis for an Allergic Reaction?

Most allergic reactions respond well to medications, but some can be rapid and deadly (anaphylaxis).

  • Hives, swelling, breathing difficulties, even anaphylaxis often improve and disappear in minutes to hours.
  • Some rashes take several days to heal.
  • A doctor may want to monitor the patient for a few hours.
  • A dangerous allergic reaction may warrant an overnight stay in the hospital.

Allergic reactions will continue with continued exposure to the allergen or trigger.

  • Avoid any triggers that cause an allergic reaction.
  • Ingested, inhaled, or injected allergy triggers may take days for the body to eliminate.
  • Continued medical therapy is necessary for continued exposure.

People may be referred to an allergy specialist if they continue having reactions.

Where Can People Get More Information About Allergic Reactions?

American Academy of Allergy, Asthma & Immunology
555 East Wells Street, Suite 1100
Milwaukee, WI 53202-3823
Phone: 414-272-6071
Physician Referral and Information Line: 800-822-2762

American College of Allergy, Asthma & Immunology
85 West Algonquin Road, Suite 550
Arlington Heights, IL 60005
Phone: 847-427-1200

National Institute of Allergy and Infectious Diseases
Office of Communications and Public Liaison
6610 Rockledge Drive, MSC 6612
Bethesda, MD 20892-6612
Toll-Free: 866-284-4107
Local: 301-496-5717
TDD: 800-877-8339 (for hearing impaired)


"Allergy Facts and Figures." Asthma and Allergy Foundation of America. <>.

Bielory, Leonard. "Complementary and Alternative Therapies for Allergic Rhinitis and Conjunctivitis." Mar. 2016. <

"Death from Anaphylaxis Is a Reassuringly Unusual Outcome." Dec. 13, 2013. American Academy of Allergy Asthma & Immunology. <>.

"Eye Allergy." American College of Allergy, Asthma & Immunology. <>.

Holloway, J.W., I.A. Yang, and S.T. Holgate. "Genetics of Allergic Disease." J Allergy Clin Immunol 125(2 Suppl 2) Feb. 2010: S81-94.

"Oral Allergy Syndrome." American College of Allergy, Asthma & Immunology. <>.

"Wheat Allergy." American College of Allergy, Asthma & Immunology. <>.

Last Reviewed 9/11/2017

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