Infant heat rash usually subsides in about 1-3 days, depending on the individual’s body type and the severity of the condition. Infant heat rash, also known as prickly heat, occurs mostly in the summer. When the ambient temperature is too high, the skin sweat glands are unable to secrete sweat normally to regulate body temperature because the baby’s thermoregulatory function is not yet mature and the sweat glands are not fully developed, resulting in a light red rash on the face, neck, groin and armpits. If the number of rashes is small and there are no other uncomfortable symptoms, no special treatment is generally needed; if the symptoms are heavy and the number of heat rashes is large, it is recommended to go to the pediatrician of the hospital in time, and anti-inflammatory and anti-itch medication can be used in conjunction with the rash, such as glycolic lotion, which will help the heat rash subside as soon as possible. In addition, parents should pay attention to keep the baby’s skin clean and dry during the heat rash to prevent infection. Usually strengthen nutrition and avoid excessive warmth.