The phenomenon of newborns twisting and turning while sleeping is usually a normal physiological condition if the baby only twists, tenses, and blushes for a few minutes and then stops on its own. This phenomenon often occurs in babies from 5 to 6 weeks old, and can also occur earlier when the baby is 2 to 3 weeks old. This can be said to be a normal physiological phenomenon, and the baby will stop when he or she is over 4 months old.