There are many reasons for babies to be sleepy. For physiological sleepiness caused by hunger and environmental factors, the main focus is to improve feeding and environment, while for sleepiness caused by diseases, timely consultation should be made to diagnose and treat the diseases that cause sleepiness. 1. Physiological sleepiness: infant hunger, high environmental temperature or too dry environment may lead to infant sleepiness, this situation is mainly to feed the child, adjust the environmental temperature and humidity and other ways to alleviate. 2. Pathological alarm: some infants alarm may be due to pathological factors, such as vitamin D deficiency, respiratory tract infections, gastrointestinal discomfort, etc., can lead to infants alarm, it is recommended to consult a doctor in time to clarify the cause of the disease and then carry out targeted treatment. When the baby sleepy, should be clear cause, if necessary, to the regular hospital for consultation, and under the guidance of the doctor for appropriate treatment.