What are the reasons for children's restless sleep?

Patient's question:

Sleep is restless, easy to wake up, limbs move, but feel not very strong, one month ago brain CT showed edema, but the doctor believes there is no problem, no action was taken, what kind of assistance is needed: asking what the reason is

Doctor's answer:

1, Lack of trace elements, reduced blood calcium leads to increased brain and vegetative nervous system excitability, causing the baby to sleep poorly at night. The baby needs to digest calcium and vitamin D. If calcium is deficient, the baby's fontanelles may not close properly; if zinc is deficient, mouth ulcers are usually common around the corners of the mouth.
2, Too hot, too cold
3, Too dry, with nasal mucus
4, Too excited before deep sleep, take naps on time: 0.5 to 1 hour before the baby falls asleep, they should be calmed down. Avoid playing too excitedly before bed or overstimulating the baby. This prevents the baby from having difficulty falling asleep due to excessive excitement and tension.