Most cases of sweating after the baby goes to sleep are normal, because the metabolism is fast, at night if the covers are too thick there will be an increase in sweating, the scalp sweat glands are well developed will have more performance of scalp sweating. Parents just need to pay attention not to cover thick clothes or cover too thick quilts at night, because children are afraid of heat and not afraid of cold. If the above is ruled out, it may be caused by calcium deficiency, which is accompanied by night crying, dreaming, sleeplessness, late closure of fontanelle, chicken chest, rickets, etc. It can be determined through trace element testing, and can also be treated with more sunshine, calcium tablets and vitamin D.