Allergies

Allergic rhinitis is also known as "hay fever." The symptoms can be seasonal, especially in the spring and fall, or year round. In this video, you'll learn what happens when you have allergic rhinitis and what you can do to minimize symptoms.

You have an allergy when your body believes that something harmless, such as peanuts or pollen, can hurt you. Your immune system overreacts. This can cause uncomfortable or even dangerous symptoms.

This is an allergic reaction to pollen. Pollen is a fine powder that comes from trees, grass and weeds. Different people are allergic to different types of pollen, and they react to it in different ways. Hay fever can be a real nuisance.

Allergic bronchopulmonary aspergillosis (ABPA) means you are having an allergic reaction to a common fungus called Aspergillus. ABPA causes the lungs to become inflamed. This leads to symptoms such as wheezing and coughing.

Learn how to help when someone is having a limited or severe allergic reaction.

Nasal allergies are a common health problem. Read on to learn more about them from causes and symptoms to treatment. And learn what other health problems can cause similar symptoms.

Nasal allergies are most often caused by 1 or more of 4 kinds of allergens: pollen, dust mites, mold, and animals.

From sinus infections to conjunctivitis, a look at common problems caused by nasal allergies.

Read on for tips to help limit your exposure to pollen.

Mold allergy is caused by mold spores, microscopic seed particles that travel through the air. Read on to learn where to find mold both inside and outside, and how to control it.

Dust mites are perhaps the most common cause of nasal allergies. Read on to learn how to keep them under control.

A detailed look at pet allergies, plus tips on how to reduce your exposure to these allergens.

Even a clean home can be full of allergens. Read on to see what you can do to cut down on allergens in each room of your home.

A detailed look at the different kinds of over-the-counter allergy medicines, and how they work.

Allergy shots are a type of treatment for allergies. The goal of the treatment is to make your body less sensitive to allergens. Allergens are the substances that cause your allergies.

A helpful look at the most common over-the-counter medicines that treat allergies.

You have been diagnosed with a serious allergic reaction known as anaphylactic shock or anaphylaxis. Learn how to take care of yourself at home.

Hives are red, itchy, and swollen areas on the skin. They are most often an allergic reaction from a food, medicine, or insect sting or bite. Read on to learn more about them.

After an injection, swelling and irritation (inflammation) can occur at the site where the needle entered the skin. This is a reaction to the needle or to the medicine that was injected. Or it may be a reaction to both.

Sublingual immunotherapy may help with your allergies. It may ease your symptoms if you are allergic to dust mites or pollen from ragweed and grass.

Allergies are problems of the immune system. Normally the immune system attacks harmful things such as viruses or bacteria. But sometimes it overreacts and responds to things that are normally harmless. These may include dust, mold, pollen, or food.