Allergy - Wikipedia
Allergies, also known as allergic diseases, are various conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment. [11] These diseases …
Allergic response - Wikipedia
An allergic response is a hypersensitive immune reaction to a substance that normally is harmless or would not cause an immune response in everyone. An allergic response may cause harmful …
Anaphylaxis - Wikipedia
Anaphylaxis (Greek: ana-'up' + phylaxis 'guarding') is a serious, potentially fatal allergic reaction and medical emergency that is rapid in onset and requires immediate medical attention …
Anaphylaxis - WikEM
Anaphylaxis. This page is for adult patients. For pediatric patients, see: Anaphylaxis (peds). References. Background. Type I hypersensitivity reaction that is either severe in nature or …
Allergies - Symptoms and causes - Mayo Clinic
2024年8月24日 · Allergies happen when the immune system reacts to a foreign substance that gets inside the body. These substances are known as allergens. They include pollen, bee …
Acute allergic reaction - WikEM
Background. Similar to Anaphylaxis but does not meet all the requirements (i.e. just skin manifestations) Type I hypersensitivity reaction. Clinical Features. Raised urticaria. …
Anaphylaxis - Symptoms & causes - Mayo Clinic
2021年10月2日 · Anaphylaxis is a severe, life-threatening allergic reaction. It can happen seconds or minutes after you’ve been exposed to something you’re allergic to. Peanuts or bee stings …
Overview: Allergies - InformedHealth.org - NCBI Bookshelf
2023年8月8日 · Allergies arise if the body's immune system overreacts to substances (allergens) that are usually harmless, such as pollen. The symptoms are sometimes quite mild, but they …
Allergic inflammation - Wikipedia
Allergic inflammation is an important pathophysiological feature of several disabilities or medical conditions including allergic asthma, atopic dermatitis, allergic rhinitis and several ocular …
Allergic Reaction Defined | AAAAI - American Academy of …
An allergic reaction occurs when the immune system overreacts to a harmless substance known as an allergen. The immune system protects the body from infections, viruses and diseases.