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Nettle rash

Urticaria (also known as hives, welts or nettle rash) is a raised, itchy rash that appears on the skin. It can be limited to one section of the body or spread across large areas of the body.
Symptoms of urticaria
The main symptom of urticaria is a red, raised itchy rash. The rash is made up of raised marks in the skin that are known as weals (also known as hives).
Causes of urticaria
Urticaria results from the release of histamine and other chemicals from under the skin's surface. This causes inflammation (swelling) of the tissues.
Diagnosing urticaria (hives)
Acute urticaria is usually diagnosed by examining the rash on your skin. Your GP will also want to find out what triggered your symptoms, so you can avoid it in future.
Treating urticaria
Most cases of urticaria will not need to be treated as the symptoms are mild and the condition often gets better on its own within a few days.
Complications of urticaria
Around half of people with chronic (persistent) urticaria and a quarter of people with acute (short-term) urticaria also get a related condition called angioedema.
See what the doctor sees with Map of Medicine
See what your doctor sees, find out what is happening with your Urticaria (Hives) treatment and what the next steps might be.