prickly heat

Skin condition which develops as a result of exposure to excessive heat and is characterized by large red pimpled spots. This condition occurs mainly on the skin of the trunk or on those parts of the skin which are kept warm by clothing. It is an abnormal reaction of the skin to heat, and there is a congenital predisposition to it. Such heat rashes occur in several members of certain families, while other families remain entirely free of the condition. The condition heals of its own accord if the patient is taken to a cool environment. However, some days may elapse before the skin’s appearance completely returns to normal.