09th October 2026
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9th October 2026
An allergy specialist has issued advice about the early warning signs of a severe allergic reaction. They also highlighted the critical timeframe that everyone needs to be aware of should a reaction occur.
Around 21 million people across the UK live with an allergic condition, according to statistics provided by Allergy UK. Hay fever alone impacts 16 million people, whereas 2.4 million adults suffer from food allergies.
Reactions can range from minor rashes to life-threatening symptoms like breathing difficulties and loss of consciousness. Hannah Kramer, clinical nurse specialist, cautions that reactions can trigger rapidly and has outlined the steps people should take.
“When someone has an immediate food allergy, the reaction typically begins within seconds or minutes of exposure to the food, and within a two-hour window from there. Interestingly, people having anaphylaxis often describe ‘an impending sense of doom’, a sense of panic and fear in response to their physical bodily symptoms,” says Kramer, from The Allergy Centre of Excellence.
“The important thing is that anaphylaxis can begin with quite subtle symptoms, such as, for example, that tickly cough that isn’t going away and wasn’t there before. Many people think that anaphylaxis is dramatic and obvious, which of course it can be, but not always.”
Kramer explains that the necessary intervention depends on the severity of the symptoms, with acute cases requiring emergency medical care. She notes that certain severe situations demand immediate administration of adrenaline, which is an injectable medication provided to individuals with known conditions, writes Elaine Blackburne for the Mirror.
Anaphylaxis is an allergic reaction that affects a person’s airway, breathing, or circulation. The NHS explains: “Anaphylaxis is a life-threatening allergic reaction that happens very quickly. It can be caused by food, medicine or insect stings. Call 999 if you think you or someone else is having an anaphylactic reaction.”
Hannah outlines the core warning signs of an allergic attack.
Symptoms of a typical (mild) reaction might include:
Hannah says: “These symptoms would be treated with a dose of antihistamine (either liquid or tablet form). However, mild symptoms can sometimes very quickly progress into severe life-threatening symptoms.”
Examples of severe life-threatening symptoms might include:
Kramer warns: “Any one of these symptoms alone is reason enough to use adrenaline (either via injection into the thigh, or with a nasal adrenaline spray). The most important thing we can teach our families is that if in doubt about what to do, and you think the person is showing any one of the symptoms we just mentioned, give adrenaline.
“It is a very safe medication that wears off within minutes; no harm will be done if you’re wrong. But the longer you wait to give adrenaline, the worse and more dangerous the outcomes could be.”
The NHS also provides guidance for those experiencing a sudden anaphylactic reaction, including when to dial 999. It states: “Call 999 if:
“You or the person who’s unwell may also have a rash that’s swollen, raised or itchy. These can be signs of a serious allergic reaction and may need immediate treatment in hospital.”
It advises that if you believe you or someone nearby is suffering an anaphylactic reaction:
It further adds: “Do not stand or walk at any time, even if you feel better.”