If a baby has convulsions during sleep, most of them are considered to be caused by electrolyte disorders, the most common of which is rickets due to calcium and vitamin D deficiency, which is clinically known as vitamin D deficiency hand and foot convulsions. It is important to have your baby’s bone density checked and blood vitamin D, calcium and alkaline phosphatase checked to see if the problem is due to a calcium deficiency or a vitamin D deficiency. After the examination, according to the situation of the examination results, the baby should be given vitamin D and calcium supplements in sufficient quantity in time so as to effectively relieve the baby’s sleep convulsions. At the same time, because the baby’s nervous system is not well developed as a child, if this kind of seizure is more, it is recommended to do an electroencephalogram to exclude brain diseases.