Scarlet fever is a relatively common bacterial infection in children, caused by Streptococcus haemolyticus type B. The recovery period for scarlet fever is usually about one week. Children who develop the disease will have a high fever, prune tongue, pale rings around the mouth, tonsillitis, and toxic symptoms of the infection. Scarlet fever is characterized by a rash immediately after the onset of fever, which is usually caused by a bacterial infection and needs to be treated with antibiotics. The rash is characterized by diffuse congestion of the skin all over the body, with a dense, small, pinpoint-sized, corn-like rash, which lasts for 3-5 days, and the fever usually breaks out in 1-2 days. Generally, the recovery period of scarlet fever is about one week, after one week, the rash subsides and the fever stops, and the child’s body returns to health. It is recommended to prevent hemolytic streptococcus B infection and pay attention to hygiene and wash hands frequently. During the recovery period, the patient’s room should be ventilated frequently, and the windows should be opened every day, once in the morning, once in the evening, preferably more than 3 times, each time not less than 15 minutes. Patients need to disinfect the tableware every day, including towels, spit towels, after the recovery of the disease to do a comprehensive disinfection, including furniture, clothing, toys, etc., bedding should be exposed to the sun.