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:
- 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.