Anaphylaxis Anaphylaxis is a severe and potentially life-threatening reaction to a trigger such as an allergy. Symptoms of anaphylaxis Anaphylaxis usually develops suddenly and gets worse very quickly. The symptoms include:
There may also be other allergy symptoms, including an itchy, raised rash (hives); feeling or being sick; swelling (angioedema) or stomach pain. What to do if someone has anaphylaxis Anaphylaxis is a medical emergency. It can be very serious if not treated quickly. If someone has symptoms of anaphylaxis:
If you're having an anaphylactic reaction, you can follow these steps yourself if you feel able to. Read about how to treat anaphylaxis for more advice about using auto-injectors and correct positioning. Triggers of anaphylaxis Anaphylaxis is the result of the immune system, the body's natural defence system, overreacting to a trigger. This is often something you're allergic to, but not always. Common anaphylaxis triggers include:
In some cases, there's no obvious trigger. This is known as idiopathic anaphylaxis. Preventing anaphylaxis If you have a serious allergy or have experienced anaphylaxis before, it's important to try to prevent future episodes. The following can help reduce your risk:
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