Scarlet fever is prone to occur in winter and spring. Scarlet fever is an infectious disease caused by streptococcal infection that first causes fever, swelling and suppuration of the tonsils, and the next day a generalized rash with a bright red color, a fine sand-like sensation, and a poppy tongue begins to appear. This disease is prone to many complications. If a child has symptoms of fever, he or she should go to the hospital promptly for routine blood tests, and if it is consistent with a bacterial infection, prompt anti-infection treatment is recommended.