There are many reasons for children to cry every night, including emotional excitement during the day, micronutrient deficiency, digestive discomfort, etc. The discomfort can be relieved according to the cause, and if necessary, timely medical attention is needed. 1. emotional excitement: emotional excitement during the day, such as overexcitement or after being frightened, can lead to brain fatigue during sleep, nightmares, etc., resulting in crying, which can generally be stopped after parents soothe them, such as patting their backs and lulling them to sleep. 2. Physiological reflex: Babies who can’t talk are hungry and excrete in their sleep to remind parents by crying, and older children will cry after wetting the bed. It is necessary to provide food, change diapers or sheets, and provide a comfortable sleeping environment in time; 3. Micronutrient deficiency: such as vitamin D deficiency can affect calcium absorption, and serious cases have vitamin D deficiency rickets, with symptoms such as excessive sweating, enlarged fontanelle, square skull, softened skull, and easy to wake up at night, etc. Vitamin D should be supplemented in time, and more sunshine should be provided to promote calcium absorption; 4. Digestive discomfort: such as indigestion, diet Irregular diet can lead to night crying, often accompanied by loss of appetite, need to timely adjust the diet plan, such as eating less and more meals, but also with intestinal probiotics to help digestion, hot compresses or massage the abdomen to promote intestinal peristalsis. Parents need to be more observant to detect problems in a timely manner as young children are less expressive and unable to tell their physical discomfort in a timely manner. In addition to nocturnal crying, there are many phenomena that can indicate the presence of disease, such as increased eye discharge and dry stools, which can indicate fire, requiring a light diet and daily hydration. A white and thickened tongue may indicate indigestion, and the appearance of papules and herpes on the skin of the hands, feet, mouth and buttocks may indicate hand, foot and mouth disease.