Aug 24, 2024 · Allergies happen when the immune system reacts to a foreign substance that gets inside the body. These substances are known as allergens. They include pollen, bee venom and pet …

Dust mite allergy, also known as house dust allergy, is a sensitization and allergic reaction to the droppings of house dust mites. The allergy is common [41][42] and can trigger allergic reactions such …

Allergies are your immune system’s overreaction to foreign substances. When you touch, inhale or eat something you’re allergic to, your body thinks it’s harmful and reacts to try to get rid of it. This can …

Jul 7, 2025 · An allergy is an immune system response to a foreign substance that’s not typically harmful to your body. Learn more about the types, causes, and symptoms of allergies, and how they're treated.

Dec 4, 2025 · Try foods, drinks, and plant compounds, like ginger, that counteract histamine reactions. Find a complete list of allergy-fighting foods here.

Read about allergy treatment, symptoms, testing, shots, and medicine. Learn about the types of allergies (asthma, allergic rhinitis, seasonal, conjunctivitis, eczema, anaphylaxis, hives) causes, risk …

Apr 1, 2025 · What Is an Allergy? An allergy is when your immune system over reacts to a harmless substance and lets out a chemical in your body called histamine.

When people have an allergy, their immune system reacts to harmless things, such as grass pollen, pet fur, or a specific food. Something that is normally harmless but causes a reaction is called an allergen.

An overview of allergy symptoms, allergy diagnosis, allergy treatment and allergy management written by AAAAI's leading experts in allergy, asthma and immunology.

May 16, 2018 · Allergies can cause a variety of symptoms such as a runny nose, sneezing, itching, rashes, swelling, or asthma. Allergies can range from minor to severe. Anaphylaxis is a severe …