”Crooked neck” is the scientific name of “oblique neck” and “myotonic oblique neck”, which is a symptom of head tilting to one side caused by various factors. For example, fetal malposition, premature birth, congenital dystonia, etc. It is easy to be ignored by parents because it does not affect their babies’ eating and drinking problems. However, in clinical treatment, we found that “crooked neck” is often the earliest symptom of abnormal brain development, and as babies grow older, other symptoms such as unstable head lifting and not turning over at 5 months will gradually show up. Some “crooked necks” are the result of “congenital myotonic neck”. Such a baby often in the head of the crooked side of the neck (sternocleidomastoid muscle) can feel a large tendon bumps, if not touched, should be considered for two reasons: 1, the crooked side of the muscle tone increased due to such a baby often hands back, like an airplane, good jerk, as long as a force, the head and arms will be in the back of the body, and some babies will appear obvious both sides of the movement is not the same more, 3 months Later, the posture of the two sides during sleep is also asymmetrical. 2, due to bilateral sternocleidomastoid muscle strength is not symmetrical, the side with greater strength can pull the head to the healthy side, such babies will often be accompanied by the affected side of the movement less, and the affected side of the upper and lower limbs are always half a beat slower when moving, as long as parents and friends pay attention to more observation, it is always easy to find. In clinical practice, it has been found that congenital myotonic neck only accounts for a small proportion of the “crooked neck”, while the rest are associated with abnormal brain development. As soon as this symptom appears, we should go to a professional rehabilitation institution for a neurological examination to prevent delay. We hope that our babies will grow up healthy and happy.