The exact cause is not very clear, but it is generally believed that the sternocleidomastoid muscle is damaged by ischemia during the birth process, which causes muscle contracture, and the clinical picture is mostly on the right side, with the head tilted to the right side and the jaw pointing to the left shoulder, while the opposite is true for left-sided squints. The child’s head is usually found to be tilted to one side around one month after birth, and when she is put in the right position by hand, there is a significant muscle tension on one side, and even a prominent nodule on the muscle can be seen, and the presence of a sternocleidomastoid nodule can be confirmed by ultrasound. If not detected in time and treated scientifically, it will cause serious deformation to the patient’s health, not only the “crooked neck”, but also the head deformity, strabismus, asymmetric facial development, scoliosis and a series of other problems, which seriously affect the patient’s physical and mental health. Therefore, early detection and scientific treatment of squint is especially important. Generally, children within one year of age can be treated conservatively by giving daily manipulation to correct the contracted sternocleidomastoid muscle by pulling and stretching, and if possible, fixing the neck to the opposite side with a sandbag during sleep, which is generally effective. For larger children, if conservative treatment for six months to a year is not effective, active surgery is recommended to avoid other deformities and permanent cosmetic defects. The surgical method is usually sternocleidomastoidotomy, but it can also be done as a plasty depending on the situation. The surgery is not very invasive, and the results are satisfactory when a cervical brace or cast is given after the surgery.