In medicine, anaphylaxis is a severe and rapid systemic allergic reaction. Anaphylaxis occurs when a person is exposed to a trigger substance, called an allergen, to which they have become sensitized. Minute amounts of allergens may cause a life-threatening anaphylactic reaction. Anaphylaxis may occur after ingestion, inhalation, skin contact or injection of an allergen. The most severe type of anaphylaxis—anaphylactic shock—will usually lead to death in minutes if left untreated. The w ...
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Signs and symptoms
... An anaphylactic reaction is most likely to occur in susceptible people who have been stung by a bee or bitten by an insect, eaten food containing food allergens, or taken a new medication. The effects...
Source: MayoClinic

... Many allergens can cause anaphylaxis. Sometimes the cause of an anaphylactic reaction is unknown. The most common causes of anaphylaxis include: Drugs, such as penicillin Foods such as peanuts, tree n...
Source: MayoClinic

Risk factors
... Anaphylaxis isn''t a common condition, though many people are at risk of having an anaphylactic reaction. If you have a history of allergies or asthma, you may be at increased risk — especially ...
Source: MayoClinic

Screening and diagnosis
... See a specialist in allergies and immunology if you have experienced an episode of anaphylaxis or think you''ve experienced some of the signs and symptoms associated with it. An evaluation typically i...
Source: MayoClinic