If a newborn baby sleeps with a shaky hand, mainly consider the following causes: 1, caused by the imperfect development of the central nervous system of the brain, this situation is the most common cause. Because the child is relatively young, the central nervous system of the brain is not well developed, and thus the ability to inhibit the shaking of the limbs is relatively weak, the child will often appear a shaking hand, and even the feet will also appear shaking. There is no particular reason for this situation, and it will be significantly relieved when the child gets older. The child’s mental state is also better at this time, and development is normal. 2. Consider that it is caused by epilepsy, you need to do an electroencephalogram, if you find that there are abnormalities in the brain waves, especially the appearance of epileptic waves, you need to carry out timely antiepileptic treatment, otherwise it will cause damage to the child’s brain and hypoxia.