Your body may usually react to harmless substances which include food, pets, pollen, mold and latex, drugs, and insects. This is your immune system responding to foreign substances, which are called allergens.

Symptoms of having an allergic reaction are the following but not limited to runny nose, itching, rashes, swelling or fatigue.

Allergies usually vary from minor to severe. Anaphylaxis is a serious, life-threatening response that can lead to difficulty of breathing, lightheadedness and loss of consciousness. If you’re having these symptoms, seek medical help immediately. Doctors identify allergies by using skin and blood testing.