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Over-the-counter decongestants are medicines you can buy without a prescription to relieve a stuffy nose.
Mastocytosis is the abnormal growth of mast cells in the body. Mast cells are part of the immune system, which…
Dust mites are tiny bugs that live in your home. They can cause allergies and problems in people with…
Anaphylaxis is a life-threatening allergic reaction that requires immediate medical attention.
A food allergy is an abnormal reaction to a food triggered by your immune system.
Antihistamine medications help relieve or prevent allergy symptoms. Learn more about first-generation and second-generation antihistamines.
Sinusitis is a condition in which the lining of your sinuses becomes inflamed. Learn about the symptoms, causes, and…
Allergic conjunctivitis is called “pink eye.” It causes your eye to become irritated, swollen, itchy, sore, and watery.
Learn about the symptoms, causes, diagnosis, treatment and prevention of allergies and allergic rhinitis (hay fever).
Learn about antihistamines and how to safely take your prescription antihistamine.
Learn about the symptoms of and treatment options for exercise-induced urticaria (hives).
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