The symptoms of baby rash, a common febrile exanthematous disease in infants and toddlers, usually occur in children under three years old. The peak incidence is between six and seven months after birth. Typically, the child suddenly has a high fever without an obvious cause. The general body temperature is around 39 to 40 degrees Celsius. Besides a loss of appetite, the child generally remains in good spirits, though some may present with a mild fever, not exceeding 38 degrees Celsius. After three to five days of fever, the temperature suddenly drops, generally returning to normal within twenty-four hours. Once the fever subsides or as the temperature begins to decrease, a rash typically appears on the skin, usually rose-red maculopapular or macular rashes. A few children may show mild irritability, swollen lymph nodes, or symptoms of diarrhea and vomiting.