A three-month-old baby’s head tilted to one side may be caused by bad habits, congenital strabismus or strabismus, and requires conservative treatment or surgery depending on the cause. 1. Bad habits: If the child usually habitually tilts his head to one side, it will form a natural reaction. It is necessary to correct the bad habit in time and improve the sitting posture, so that the head can be artificially tilted to the other side when sleeping at night. 2. Congenital strabismus: Including muscular strabismus and bony strabismus, traction or manipulation is usually recommended, and if the condition is more serious, surgical correction, such as sternocleidomastoid myotomy, can be considered. 3. Strabismus: It is a kind of vision disorder. If the vision is not adjusted in time, the baby will often tilt his head or neck to one side. At present, it is recommended to have an optometry examination as soon as possible. If strabismus is detected, it needs to be corrected by surgery in time, or you may choose to wear glasses to correct it. If the head tilting to one side of the three-month-old baby is caused by the above factors, it is necessary to consult the doctor first when carrying out correction and follow the doctor’s requirements in order to avoid causing adverse reactions.