There are many causes of “crooked neck” in children, in general, there are the following: 1. congenital “myotonic squint”. Due to the pulling of the sternocleidomastoid muscle, the neck is skewed and the head is tilted to the affected side, while the jaw is turned to the healthy side, forming a special “crooked neck” posture deformity. The cause of the disease is still not fully understood. After 2-3 months, the mass gradually shrinks and disappears completely after 6-8 months. After the mass disappears, the sternocleidomastoid muscle on the affected side starts to protrude, become tighter and shorter, the head is deviated to the affected side, neck movement is restricted, and facial asymmetry gradually appears, the affected side of the face is short and flat, the healthy side is long and round, both eyes, both ears and the corners of the mouth are not at the same level. If the deformity is not treated reasonably in infancy, the deformity will gradually worsen with age and its therapeutic effect will be reduced, which will bring adverse effects to the child physically and mentally. Therefore, early detection and early treatment are crucial. 2. “Oculocutaneous squint”. There are many causes of ocular disease in childhood that can lead to a “crooked neck”, such as severe amblyopia, myopia, hyperopia, and congenital epicanthalmia, which can lead to “strabismus”. It is important to pay close attention to children’s eye diseases, such as amblyopia, nearsightedness and farsightedness, which can be treated and corrected by prescription glasses. Some diseases, such as congenital hypoplasia of the upper eyelid muscles, require surgical treatment to cure the “strabismus” and fundamentally cure the “ocular squint”. 3. “Bony strabismus”. Due to congenital cervical spine developmental disorders, such as hemivertebral malformation, it can lead to the bending of the cervical spine, resulting in the “crooked neck” deformity. This deformity is relatively rare, and it gets progressively worse as we get older. Surgery is the only treatment method, and generally speaking, the earlier the surgery, the better the treatment effect. 4. “Otogenital oblique neck”. Some childhood causes can lead to hearing loss in one ear, resulting in a “crooked neck”. For example, unilateral congenital deafness, hearing loss due to medication, cerumen embolism, etc. These are the four common causes of “crooked neck” in children, but there are also other conditions that can lead to these symptoms, such as benign paroxysmal squint in infants, the cause of which is unknown, but the prognosis is good.