Hospital admissions for severe allergies have more than doubled in the past two decades, NHS data reveals.
The number of patients needing treatment for anaphylactic shock after a food reaction rose from 686 in 2002-03 to 1,483 in 2022-23.
Cases involving asthma increased by two-thirds, from 5,551 to 9,217, and those for pollen reactions leapt from just 124 to 2,133.
Overall, there were more than 25,000 cases where an allergic reaction was the primary cause of admission last year, up from 12,300 two decades earlier.
Professor Adam Fox, a leading expert in paediatric allergy, said there has been a significant increase in allergy services in hospitals over the past 20 years. Some admissions were likely to be cases where children suffered food reactions during diagnostic tests.
He added: “Other explanations could be that there is much better recognition that
allergies are potentially dangerous, so people are more likely to take their children to A&E if they’re having a reaction.”
Around 5 percent of children are thought to be affected by food allergies.
The most common cause of severe reactions in young children is milk, while older children are more likely to be affected by things like peanuts.
Changes in our gut bacteria are thought to be responsible for the increase in allergies since the 1990s. A rise in hospital births, dietary changes, greater consumption of ultra-processed food, and increased use of bacteria have all affected our gut micro-bacteria.
Prof Fox said: “That could have impacted the way that our immune systems interact with the outside world, leading to a change in our likelihood of becoming allergic to things.”
He added: “The overwhelming majority of admissions with allergic reactions will be relatively short-lived.
“Fatal allergic reactions are really rare. The important thing is that if you believe you’re at risk, you’ve got a diagnosis and have been prescribed the appropriate medication.”
Simon Williams, chief executive of Anaphylaxis UK, said that although the numbers were “big and scary”, people should be reassured that they can live well with allergies.
He said: “People do get understandably very anxious and having a serious allergy has a profound impact on people’s quality of life.
“But with the right skills and managing things properly, those risks can be minimised.”