This condition, also known as ‘hives’ or ‘nettle rash’, is due to the body being exposed to something to which it is allergic. This may be by direct skin contact or by eating a particular food to which the individual has become sensitive. The appearance is similar to that produced by nettle stings and is extremely itchy. Treatment is with antihistamines to try to reduce the allergic reaction and the application of calamine lotion to lessen the itching.