An allergy is a hypersensitivity disorder of the immune system. Allergic reactions occur when a person's immune system reacts to normally harmless substances in the ...

Get the facts about allergic reactions, causes, allergy types (food, dust, mold, seasonal), symptoms and signs (skin rash, itching, red bumps, sneezing).

Read about allergic reaction causes, treatment and prevention. Allergy symptoms and signs include swelling, hives and rashes, and severe reactions may cause anaphylaxis.

Up to 50 million Americans, including millions of kids, have an allergy. Find out how allergies are diagnosed and how to keep them under control.

An allergy is an exaggerated immune response or reaction to substances that are generally not harmful. Allergies are pretty common. Both genes and ...

Considerations. Allergic reactions are common. The immune response that causes an allergic reaction is similar to the response that causes hay fever.

Allergies are a condition that occurs when the immune system mistakenly identifies a substance as harmful to the body. These substances can range from things people ...

Sneezing, difficulty breathing, cramps, and vomiting–all are allergy symptoms. Learn the types of allergies, specific allergy symptoms, and emergency warning signs.

Learn whether allergy shots can help you deal with your allergies.

Allergy information includes articles on allergies, symptoms, treatment, medications, food allergies, and allergy relief.

Allergies affect nearly 20% of Americans. Here you'll find in-depth allergy information including treatments

allergy /al·ler·gy/ (al´er-je) a hypersensitive state acquired through exposure to a particular allergen, reexposure bringing to light an altered capacity to react.

The American Academy of Allergy, Asthma & Immunology (AAAAI) is an international professional organization with more than 6,500 members who have an a special interest ...

Pollen.com - Click on the current allergy forecast USA Map to get your local allergy report. Track you allergies with MyPollen, check past allergy levels, and more ...

Allergic reaction information on food, drug, and insect sting allergy, indoor allergens, symptoms, treatment, and medications.

Find out how to tell if your child has allergies and what you can do to treat or prevent allergies in children.