Children who sweat a lot soon after falling asleep can be seen in physiological phenomena, pathological conditions (such as vitamin D deficiency, febrile diseases, etc.), need to be analyzed on a case-by-case basis. 1. Physiological phenomenon: If the ambient temperature around the sleeping area is too high, or if the clothes and blankets worn are thicker, more sweating may occur. Usually, such children do not have any obvious abnormal symptoms, so adjust the indoor temperature and reduce the clothes as appropriate. 2. Condition: (1) Vitamin D deficiency: for younger babies, in the early stage of the disease, there may be increased nerve excitability and excessive sweating at night, and some of them may have bone changes such as softening of the cranium and squaring of the skull. (2) Febrile illnesses: such as infantile emergency rash, the baby has night fever, and sweating may increase during the process of body temperature decline. It is recommended to consult a specialist for assessment and judgment to clarify the cause and treatment.