Anaphylaxis is a serious allergic reaction. It can begin very quickly, and symptoms may be life-threatening. The most common causes are reactions to foods (especially peanuts), medications, and stinging insects. Other causes include exercise and exposure to latex. Sometimes no cause can be found.
It can affect many organs:
Skin - itching, hives, redness, swelling
Nose - sneezing, stuffy nose, runny nose
Mouth - itching, swelling of the lips or tongue
Throat - itching, tightness, trouble swallowing, swelling of the back of the throat
Chest - shortness of breath, coughing, wheezing, chest pain or tightness
Heart - weak pulse, passing out, shock
Gastrointestinal tract - vomiting, diarrhea, cramps
Nervous system - dizziness or fainting
If someone is having a serious allergic reaction, call 911. If an auto-injector is available, give the person the injection right away.
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