Diagnosis of myotonic squamous neck: congenital myotonic squamous neck lesion in the sternocleidomastoid muscle, there is no deformity at birth, 10-14 days later a mass appears, gradually forming sternocleidomastoid contracture and squamous neck, the mass appears in the middle and lower 1/3 of the sternocleidomastoid muscle, hard texture, not fixed, no pain, within 6 months the mass gradually disappears, gradually appearing facial asymmetry, head backward to the affected side, jaw turned to the healthy side, jaw turned to the affected side Restricted. In the early stage, the diagnosis relies on clinical manifestations, and after the mass disappears, ultrasound can detect the thicker sternocleidomastoid muscle on the affected side than on the opposite side. Treatment: Early treatment is based on manual correction by fixation, shoulders and passive turning of the jaw to the affected side, so that the head is inverted to the healthy side while pulling the affected side, 200-300 times a day to prevent contracture of the sternocleidomastoid muscle, and light toys are placed above the child’s healthy side to induce it to rotate to the healthy side to prevent excessive differences in cheek development. If conservative treatment does not work, surgical treatment can be performed at the age of 1.5-2 years to cut off the sternocleidomastoid muscle + orthopedic cap or orthopedic brace fixation.