A three-year-old child has been talking in their sleep, experiencing restless sleep and excessive sweating at night, possibly due to calcium deficiency causing an elevated excitability of the nervous system.

Starting from the age of 6, children often suddenly sit up and talk or cry while sleeping, usually within the first two hours after falling asleep.

Children speaking in their sleep at night might be due to excessive stress or nervous tension. It is recommended to enhance exercise, pay attention to rest, and adjust life stress.