Anaphylaxis is a life-threatening allergic reaction which includes throat or tongue swelling, vomiting or diarrhea, skin rash, dizziness, low blood pressure, shortness of breath due to narrowing of airways, and low blood pressure. The reaction may occur within minutes or even seconds of allergen exposure. The common causes include stings, insect bites, medications (like aspirin, and pain relievers), and foods (such as nuts and shrimp). Rarely, this may be caused by exercise, latex, and even if there is no obvious trigger. This is treated with an immediate epinephrine injection. This can be fatal if there is no emergency medical help.

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