Allergic Reaction Symptoms, Severe (Anaphylaxis)

Symptoms of a severe allergic reaction (anaphylaxis) may include: The sudden appearance of raised, red areas (hives) all over the body. Rapid swelling of the throat, mouth, or tongue. Trouble breathing. Passing out (losing consciousness). Or you may feel very lightheaded or suddenly feel weak, confused, or restless. A…

Allergic Reaction Symptoms, Severe (Anaphylaxis)

Allergic Reaction Symptoms, Severe (Anaphylaxis)

Symptoms of a severe allergic reaction (anaphylaxis) may include:

  • The sudden appearance of raised, red areas (hives) all over the body.
  • Rapid swelling of the throat, mouth, or tongue.
  • Trouble breathing.
  • Passing out (losing consciousness). Or you may feel very lightheaded or suddenly feel weak, confused, or restless.

A severe reaction can be life-threatening. If you have had a bad allergic reaction to a substance before and are exposed to it again, treat any symptoms as an emergency. Even if the symptoms are mild at first, they may quickly become very severe.

Credits

Current as ofJune 26, 2019

Author: Healthwise Staff
Adam Husney, MD - Family Medicine
Kathleen Romito, MD - Family Medicine

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