The main symptom of hives (urticaria) is a rash.
The rash may:
The image shows a hives rash on the side of the stomach. The rash is small, circular patches of pink on pale skin.
Hives can usually be diagnosed by examining the distinctive red rash. The pharmacist or GP may also ask you questions to find out what triggered your symptoms.
If your symptoms last a while (chronic urticaria), a doctor may arrange for tests to help work out the cause. They’ll also ask about anything that makes your symptoms worse.
Most hives rashes don’t need treatment. The symptoms are usually mild and often get better within a few days.
If necessary, a pharmacist can give you advice about antihistamines to help treat hives.
Antihistamines may not be suitable for young children or if you’ve got a long term condition. You should discuss this with the pharmacist.
If hives are more severe, your doctor may prescribe:
If hives don’t go away with treatment, a doctor may also refer you to a skin specialist (dermatologist).
You could be having a serious allergic reaction (anaphylaxis) and may need immediate treatment in hospital.
Hives occur when histamine and other chemicals are released from under the skin’s surface. This causes the tissues to swell.
Histamine can be released for many reasons, including:
If you can, try to work out what’s causing your hives. This can help to avoid them in the future.
Complete our self-help guide to check your symptoms and find out what to do next.
Complications of hives can include:
Last updated:
29 May 2023