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Symptoms & signs of anaphylaxis include
- Tight or constricted breathing
- Swelling of the tongue
- Difficulty speaking and sometimes a hoarse voice
- Swelling or tightness in the throat
- Rapid heart rate and low blood pressure
- Loss of consciousness/collapse
- Pale appearance and floppiness in small children or babies
Sometimes there may be milder signs of allergy before the above symptoms start, which can include:
- A tingling sensation around the lips or mouth.
- Hives or welts
- Abdominal pain and vomiting (although these are viewed as signs of anaphylaxis in the case of insect allergy)
In around 1 in 5 cases, there may be a second bout of anaphylaxis within 12 hours of the first. This is called biphasic anaphylaxis.