It is normal for the vast majority of newborns to sleep with their legs curled up. As babies get older, their legs will gradually develop, grow and straighten. Generally, no special treatment is needed. However, if there are accompanying symptoms such as convulsions, seizures, jumping, etc., we need to be alert to the possibility of neurological disorders. After the birth of the newborn, most of them will maintain the fetal position, they will sleep with their legs curled up, as long as there are no other accompanying symptoms, such as convulsions, convulsions, etc., parents do not need to worry too much, with the growth of the age of the month, the baby’s legs will gradually develop, naturally straighten, and will not cause any adverse effects. However, if the newborn sleeps with legs curled up, there are also accompanying symptoms, such as convulsions, convulsions, startled jumping, etc., need to be alert to the possibility of neurological disorders, such as ischemic-hypoxic encephalopathy, cerebral palsy, etc., it may be abnormal, and we recommend that the parents take the child to the doctor to improve the electroencephalogram and other related examinations, to clarify the cause of the disease, timely treatment, to avoid affecting the body’s development.