Allergy symptoms

Allergy symptoms depend on the substance involved and can involve the airways, sinuses and nasal passages, skin, and digestive system. Allergic reactions can range from mild to severe. In some severe cases, allergies can trigger a life-threatening reaction known as anaphylaxis.

Hay fever, also called allergic rhinitis, may cause:

• Sneezing
• Itching of the nose, eyes or roof of the mouth
• Runny, stuffy nose
• Watery, red or swollen eyes (conjunctivitis)

A food allergy may cause:

• Tingling mouth
• Swelling of the lips, tongue, face or throat
• Hives
• Anaphylaxis

An insect sting allergy may cause:

• A large area of swelling (edema) at the sting site
• Itching or hives all over your body
• Cough, chest tightness, wheezing or shortness of breath
• Anaphylaxis

A drug allergy may cause:

• Hives
• Itchy skin
• Rash
• Facial swelling
• Wheezing
• Anaphylaxis

Atopic dermatitis, an allergic skin condition also called eczema, may cause skin to:

• Itch
• Redden
• Flake or peel