Slanting neck is usually caused by contracture of the sternocleidomastoid muscle on one side, causing the neck to deviate to one side. Rarely, it is caused by skeletal deformities, neurological disease, inflammation of the soft tissues of the neck (e.g., lymphadenitis), or visual abnormalities. Symptoms: Infants are born with no abnormalities, but usually 7-10 days later a hard node (66%) is found in the middle and lower third of the sternocleidomastoid muscle of the neck, about 1-3 cm in size and round or oval in shape. The child’s head is inverted to the affected side and the jaw is turned to the healthy side, while rotation to the affected side is limited. Older children present with a very tight tendon on one side of the neck. The face may be asymmetrical from side to side. Treatment: Younger children (under 1 year old) with no facial asymmetry and less severe muscle contracture may try physiotherapy first. Older children with asymmetrical face and very tense muscles should undergo surgery, which is called “sternocleidomastoid muscle release”. After surgery, the neck mostly resumes normal movement, and attention is paid to tilting the head to the healthy side to prevent recurrence of adhesions. However, it takes a long time to eliminate the facial asymmetry, and it is more difficult to return to normal in severe cases, so the earlier the surgery, the better the result. Recurrence can occur in a small number of patients. The chance of recurrence is slightly higher after physical therapy and lower with surgery.