There are many causes of crooked neck in babies, including physiological factors and pathological factors. 1. Physiological factors: If a baby develops a crooked neck around the third month of life, it may be caused by insufficient strength of the cervical vertebrae and neck muscles, which are not strong enough to support the head. If the baby often maintains a unilateral posture, it is also easy to cause a crooked neck. Parents need to adjust the baby’s bad posture in time, and the symptoms will usually disappear with the baby’s growth and development. 2. Pathological factors: mainly including osseous, muscular, neurogenic and ophthalmic cervical tilt, etc., which can be preliminarily determined by whether the patient’s head movement is restricted and whether there is a lump in the neck. Timely intervention and treatment is recommended, as it can lead to facial asymmetry and even affect the eyes in severe cases. There may also be other reasons for the baby’s crooked neck, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.