Congenital oblique neck generally includes four types: First, congenital muscular oblique neck, congenital muscular oblique neck is usually due to ischemia or hemorrhage of the sternocleidomastoid muscle during childbirth due to birth injury or obstructed labor, which causes the neck to be skewed to one side, a mass can be seen at the sternocleidomastoid muscle during physical examination, the face is uneven, the affected side of the face is short and flat, while the healthy side is long and round, both eyes and both ears are not in the In severe cases, the cervical vertebrae may protrude to one side, which is common in infants of a few months old or teenagers. Secondly, bony squint, which is often caused by congenital deformities such as atlantoaxial subluxation, cervical subluxation and cervical fusion. Thirdly, infective neck squint, which is often caused by inflammation of the neck, such as tonsillitis and lymphadenitis, can be diagnosed according to the medical history. Fourthly, visual squint, which is caused by visual impairment, such as refractive error or paralysis of the eye nerve, and leads to squinting of the neck when seeing things, should be diagnosed at an early stage by going to ophthalmology examination.