There is no such disease as hemorrhagic fever, which should refer to scarlet fever. Scarlet fever is an acute respiratory infectious disease caused by infection with group A hemolytic streptococcus. The common manifestations of scarlet fever are fever, pharyngitis, diffuse bright red rash over the whole body, and obvious desquamation after the rash recedes; in a few patients, cardiac, renal, and joint damages can be induced by the allergic reaction. Throat swabs, blood tests, and cultures of secretions from other lesions are generally recommended. It is common that the total number of leukocytes and the proportion of neutrophils are elevated in the blood routine; eosinophilia in the blood routine after the rash is manifested. When the diagnosis of scarlet fever is confirmed, it is necessary to first isolate for more than 6 days until the culture of throat swab is negative for 3 times, and the isolation can be lifted when there is no complication. In the acute stage, bed rest should be provided, eat soft and light food, and drink plenty of water; at the same time, attention should be paid to maintaining oral and skin hygiene to prevent infection. For drug treatment, penicillin is preferred, such as benzoxacillin, cloxacillin, etc.; erythromycin or cephalosporin can be used for those who are allergic to penicillin. If infectious toxic shock occurs, blood volume should be actively supplemented and acidosis should be corrected. Drugs need to be used under the guidance of a doctor, avoid self-medication.