Babies can sleep with their heads tilted on their backs, which is a normal sleeping position. However, if the baby’s head is tilted to one side for a long time, we need to be alert to the possibility of congenital cervical strabismus and other diseases, and if necessary, we can improve the body surface ultrasound and other tests to clarify the diagnosis. Infants lying flat with their heads tilted to sleep is perfectly fine, is a completely normal position. Due to the baby’s young age, easy to occur gastroesophageal reflux, if the baby is completely lying flat, there may be gastroesophageal reflux after the occurrence of aspiration, serious cases may occur aspiration pneumonia, so the baby lying flat, head tilted to the side is very good, completely normal sleeping position, parents do not need to be overly concerned about. However, if the baby’s head is usually tilted to one side for a long time, we need to be alert to the possibility of congenital strabismus and other diseases, which can be clearly diagnosed by palpation and ultrasound examination of the body surface. If necessary, you can go to the hospital to improve the ultrasound and other tests. If there is any abnormality, you can follow the doctor’s instructions to intervene.