Symptoms of Nettle rash

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The urticaria rash consists of raised white or reddish lumps surrounded by red inflamed areas. These are sometimes described as wheals. These wheals vary considerably in size, from few millimetres or several centimetres in diameter, they may merge to involve large areas of the body. The wheals can be any shape but are often circular.

These raised wheals typically last a few hours; they then flatten, leaving red marks, which usually disappear within a day or so. New wheals may then appear in other areas.