First aid for a severe allergic reaction (anaphylaxis).
A life-threatening allergic reaction (anaphylaxis) can cause shock, a sudden drop in blood pressure, and trouble breathing. In people who have an allergy, anaphylaxis can occur minutes after exposure to a specific allergy-causing substance (allergen). In some cases, there may be a delayed reaction or anaphylaxis may occur without an apparent trigger.
Source: Self.com Read: Original Article