For other uses, see Serial killer (disambiguation). A serial killer is typically a person who murders three or more people, usually in service of abnormal psychological gratification, with the murders taking place over more than a month and including a significant break (a cooling off period) between them.
Heat rash (prickly heat) is a red or pink rash usually found on body areas covered by clothing. It can develop when the sweat ducts become blocked and swell and often leads to discomfort and itching. Heat rash is most common in babies, but it may affect adults in hot, humid climates.
Cool off if you have a heat rash. If you have been exposed to extreme heat and have developed an inflamed, hot rash on your body, as well as lightheadedness and fatigue, you may have heat rash. If you suspect you have heat rash, get out of the sun right away and sit in a cool, air conditioned area.