A child’s temperature after the rash is not normal may be the cause of secondary infection, scarlet fever, measles and other reasons, need to be specifically analyzed. 1. Acute infantile rash: Generally speaking, acute infantile rash is the most common cause of rash in children, but it manifests itself as a fever retreating from the rash, if the temperature is still not normal after the rash, it means that improper care after the rash, secondary infection or accompanied by other comorbidities such as upper respiratory tract infections, so that the child has a fever. 2. Scarlet fever: If the child suffers from scarlet fever, the viral infection will be more serious, causing the child to still have fever after the rash, at this time the skin appears red, accompanied by strawberry tongue and other characteristics. 3. Measles: This is a contagious disease, if the child has been in contact with patients with measles, it will lead to its own infection by the measles virus, appearing rash with fever. If a child’s temperature is not normal after the rash, it is recommended to go to the hospital in time, under the guidance of the doctor for standardized treatment.