Asthma & Allergy

Seasonal allergies, also called hay fever, occur when your immune system reacts to a foreign substance in the environment, like pollen from flowers, trees, or grass. Find out what you’re allergic to and learn how to prevent and treat hay fever.

An allergic reaction is when the body responds to something that it sees as a threat, even though it isn’t. A mild reaction may cause minor symptoms, like sneezing or itchy eyes. A severe reaction is anaphylaxis, and it can be life-threatening.

Asthma and chronic obstructive pulmonary disease (COPD) can both make it hard to breathe. They both block the flow of air, but not for the same reason. Understanding the differences between these two lung diseases can improve your treatment and outcome.

Allergies may be triggered by pollen, food, and medication. Depending on its severity, you may get relief from antihistamines or allergy shots. But if you’re having a severe attack, call 911 immediately.

Rhinitis is a swelling and inflammation inside of the nose, causing a runny nose, congestion, and sneezing. Rhinitis can be allergic or nonallergic. There are OTC and prescription meds to relieve symptoms.

Asthma is a condition where the airways of the lungs are hyperresponsive—they overreact—to a specific trigger such as allergens (including to pet dander, dust mites, or pollen), cold air, or exercise.

Angioedema is sudden swelling of the deep layer of your skin in one part of your body—most often in the face, mouth, or throat. But it can also affect the hands and feet, genitals, and the bowel wall.

An alcohol allergy means you’re allergic to an ingredient in the drink, but an intolerance is when your body is unable to process alcohol. Understanding the different symptoms can help you avoid dangerous drinks.

An asthma attack is when asthma symptoms worsen. The lining of the airways becomes inflamed, making it hard to breathe. An asthma attack can be an urgent situation that requires immediate medical attention.