Baby’s shrugging and shrinking of neck may be caused by bad habits, Tourette’s syndrome and infantile spasms. 1. Bad habits: babies have curiosity about many things, if family members have the bad habit of shrugging their shoulders and shrinking their necks, it is considered to be a shrugging and shrinking of the neck caused by the baby’s intentional imitation. 2. Tourette’s syndrome: if the baby suffers from Tourette’s syndrome, there will be local muscle abnormalities occurring repeatedly contraction, which will lead to the phenomenon of the baby shrugged shoulders and neck, accompanied by squeezing eyebrows, sniffing and other symptoms. 3. Infantile spasms: babies with infantile spasms will have abnormal neurons in the brain, which will lead to localized twitching of the body, resulting in shrugging and shrinking of the neck. When the baby shrugs and shrinks the neck and accompanied by obvious discomfort, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and give standardized treatment.