Children crying in bed may be related to physiological factors, environmental factors, indigestion, rickets and so on. 1. Physiological factors: if children are too excited to play or watch scary cartoons during the day, it will easily lead to mental over-excitement, easy to have nightmares at night when sleeping, and the situation of crying in bed. 2. Environmental factors: If the indoor temperature is too high or too low or the blanket is too thick, it will easily lead to children’s irritability and discomfort during sleep, causing crying and screaming. 3. Indigestion: If children overeat or eat indigestible food at night, it may lead to gastrointestinal dysfunction, causing indigestion, abdominal pain, bloating and other discomforts, resulting in the phenomenon of crying in bed. 4. rickets: when the child long-term picky eating, partiality, may lead to a lack of vitamin D in the body, causing the occurrence of rickets, sleep crying, irritable, sweaty situation. After excluding physiological and environmental factors, parents should take their children to the hospital pediatrician in time for relevant examination and give them proper treatment according to the examination results.