In rare cases, some people develop extreme allergic reactions to cats, like severe difficulty breathing, which might require immediate medical care. People regularly exposed to cats tend to have more ...

An allergic response occurs when your immune system reacts abnormally to a common substance in the environment. That substance is known as an allergen. It causes an inflammatory response in the ...

These are over-the-counter (OTC) and prescription medications that block histamine, a chemical that causes your body to develop allergic symptoms such as sneezing, itching, a runny nose ...

If the spots are larger and red or purple, you may have another type of bleeding problem called purpura. Petechiae can form just about anywhere on your body, even your eyelids or inside your mouth.

Psychological stress weakens the ability of certain immune cells to clear away dead cells, causing a buildup that triggers more inflammation and worsens allergic reactions Study: Stress ...

Allergic reactions in babies and infants can range from mild to severe or even life-threatening. Emergency symptoms of anaphylaxis (a severe allergic reaction) can develop within minutes. Infants can ...

An allergic reaction, or when your immune system overreacts to a harmless substance, can sometimes manifest in the form of a rash. An allergy rash can be uncomfortable and lead to infections ...

5,8,16,17 Once desensitized, it is prudent to maintain regular ASA therapy to prevent breakthrough ASA allergic reactions. There are no published protocols involving ASA desensitization in individuals ...