Allergic conjunctivitis is not contagious, but other types of conjunctivitis, such as viral or bacterial, are. People can take steps to prevent transmission of the contagious types. These steps ...

Seasonal allergies happen when your body's immune system overreacts to ordinarily harmless things in the environment, like pollen. This overreaction can cause symptoms such as sneezing, a runny nose, ...

What Is a Peanut Allergy? You have a peanut allergy when your body’s immune system overreacts to peanuts. Normally, your immune system helps protect you from germs and other harmful substances. But if ...

Allergy sufferers may one day be able to erase the source of their congestion, itchy skin and swollen lips and throat thanks to two studies that have uncovered elusive immune cells that maintain ...

Learn the key symptoms of conjunctivitis, how viral, bacterial, and allergic pink eye differ, and when eye redness or discharge needs medical attention.

Daniel More, MD, FAAAAI, FACAAI, FACP, is a board-certified allergist and former clinical immunologist at Allergy Partners of the Central California Coast. Allergies occur when the body mistakes a ...

A mango allergy can cause mouth itching, hives, vomiting, or breathing issues shortly after exposure. A person may also experience a delayed reaction, such as a rash around the mouth or eye swelling.

Researchers have identified an allergy pathway that, when blocked, unleashes antitumor immunity in mouse models of non-small cell lung cancer (NSCLC). And in an early parallel study in humans, ...

An allergy involves a mild to life threatening immune response to an external substance. A sensitivity, on the other hand, is typically a milder reaction associated with difficulty digesting food. An ...

It used to be that the only way for people with food allergies to prevent a serious allergic reaction (like anaphylaxis) was to avoid that food completely. Unfortunately, even when a person does their ...

Some people have apple allergies, especially if they are allergic to birch pollen. Symptoms of apple allergy include itching in the mouth and throat, and can be more severe like hives or anaphylaxis.