For most allergies, the symptoms are directly related to the type of allergy. For example, contact allergens cause a skin reaction, while airborne allergens result in respiratory symptoms. This list includes the symptoms potentially caused by all types of allergies:

  • Sneezing
  • Runny nose
  • Congested nose
  • Itchy nose, eyes, or mouth
  • Watery eyes
  • Skin rash or hives
  • Swollen area at the site of an insect sting
  • Nausea, diarrhea, abdominal cramping

Allergies to foods, insect stings, and latex may cause a severe reaction called anaphylaxis. If that happens, you’ll experience symptoms such as difficulty breathing, swelling of your tongue and throat, and dizziness.

An anaphylactic reaction is a medical emergency that rapidly worsens and can lead to loss of consciousness and even death. At the first sign of a severe reaction, call 9-1-1 immediately and use your epinephrine injector.