Children talking in their sleep is a manifestation of sleeplessness and nightmares. During the growth and development of children, it is common for them to talk in their sleep. In this case, it is necessary to consider that there are symptoms of sleeplessness and nightmares; at the same time, there is a calcium deficiency, which can lead to such a situation. Before going to bed or during the day when the brain’s excitement level is relatively high, over-excitement or stimulation of some external environmental factors, which causes the child to be more excited and nervous, may cause such a situation. The nightmares are further aggravated, and even the performance of sleepwalking may appear. If the child has frequent sleep talking performance, it is also necessary to carry out appropriate conditioning treatment, such as calcium supplementation, improving digestive function, and improving the state of over-excitement and so on.