Urticaria (hives)

Urticaria also known as hives, weals, welts or nettle rash is a raised, itchy rash that can affect one part of the body or be spread across large areas.It'sa common skin reaction that often affects children.

Urticaria occurs when a trigger causes high levels of histamine and other chemical messengers to be released in the skin. These substances cause the blood vessels in the skin to open up, resulting inredness or pinkness, and swelling and itchiness.

There are many possible triggers of urticaria, including allergens, such as food or latex, irritants, such as nettles, medicines, and physical factors, such as heat or exercise. Sometimes, a cause can't be identified.

The rash is usually short-lived and mild, and can often be controlled with antihistamines .


Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dec 2018