The recovery of the trapezius can be determined by physical examination, ultrasonography and X-ray examination. 1. Physical examination (1) The head moves freely, the head position is centered, the appearance and range of motion of the head are normal, and the swelling of the sternocleidomastoid muscle on the affected side has disappeared. (2) The muscle tone of the sternocleidomastoid muscle on both sides is symmetrical. (3) On the back of the head, there was no obvious atrophy of the trapezius muscle, and the muscle strength was normal on both sides. (4) Both eyes are symmetrical, facial features are straight, there is no atrophy of facial muscles, and the eyes are looking at the moving objects. (2) Ultrasonography: the ultrasonic performance of the sternocleidomastoid muscle was normalized, with strips of low echogenicity, and linear muscle bundles were seen within the echogenicity, starting from the anterior edge of the sternal handle and the upper edge of the clavicle, ending at the temporal mastoid, and symmetrical on the left and right sides. 3. X-ray examination: showed no osteoarticular changes.