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Anaphylaxis is a severe, potentially life-threatening allergic reaction.
Symptoms of anaphylaxis
The time it takes the symptoms of anaphylaxis to develop depends on how the trigger entered your body.
Causes of anaphylaxis
Anaphylaxis is caused by a problem with the immune system, which is the body's natural defence against illness and infection.
Treating someone who has anaphylaxis
If you suspect that somebody is experiencing the symptoms of anaphylaxis, immediately call 999 for an ambulance.
Preventing anaphylaxis
If you have anaphylaxis, you should be offered advice and medication to help prevent further episodes.
See what the doctor sees with Map of Medicine
See what your doctor sees, find out what is happening with your Anaphylaxis treatment and what the next steps might be.