Dangerous allergic reactions are rising in England and now cause some 25,000 NHS hospital stays a year, data shows.
Health officials say the rate has more than doubled over 20 years, prompting them to issue advice reminding people how to recognise allergies and respond.
For severe food-related allergic reactions, the rise in admissions is even greater.
Provisional figures show admissions rose from under 2,000 twenty years ago to more than 5,000 in 2022/23.
The data, gathered by the NHS and analysed by the Medicines and Healthcare Products Regulatory Agency, does not include people who visited outpatient or Accident and Emergency departments with allergies and were discharged without requiring a hospital stay.
The figures suggest anaphylaxis is on the increase, though some of the rise could be attributed to the growth in population.
Anaphylaxis can be fatal and develop suddenly at any age.
People who know they are at risk should always carry two adrenaline pens which they, or someone else, can administer in an emergency.
In addition, people at risk of an anaphylactic reaction should regularly check the contents of their adrenaline pens have not expired. They should see a pharmacist to get a new one if a pen is close to expiring.
