The 8-year-old child fever hands and feet with a rash may be due to chickenpox, scarlet fever, measles and other causes. 1. Chickenpox: an acute infectious disease caused by the initial infection of varicella zoster virus, often in childhood, generally self-limiting, need to isolate themselves to wait for the rash to crust, during which you can use some antibiotics such as acyclovir or anti-itching drugs such as glycerol shampoo and so on. 2. Scarlet fever: an acute respiratory infection caused by hemolytic streptococcal infection. A small number of patients may have allergic reactions that may cause damage to the heart, kidneys and joints. They should be isolated, put on bed rest, and use penicillin (amoxicillin) to fight the infection. 3. Measles: one of the most common acute respiratory infections in children, highly contagious, persistent fever, sore throat, red maculopapular rash all over the skin and other symptoms, self-limiting, generally need isolation, rest, cooling, such as ibuprofen, anti-infective such as cefdinir, nutritional such as vitamin A and other treatments. There are other diseases that can also cause fever, hand and foot rash such as hand, foot and mouth disease, need to go to the pediatrician in time to request a professional physician for examination, diagnosis and treatment, do not self-medication, vaccination on time, pay attention to the child’s usual mouth and hand hygiene.