3-month-old baby’s head tilted back after vertical hold may be normal, for example, 3-month-old baby’s neck neuromuscular development is still incomplete, can appear vertical head unstable performance, but also need to be alert to the possibility of disease, such as meningitis, cerebral palsy, trisomy 21, and so on. Specific needs to be judged according to the condition. May be due to the baby is still too small, the spine, neuromuscular development has not been perfect, vertical hold can not support the weight of the head, which can appear 3 months baby vertical hold after the phenomenon of head tilted back. This is a physiological phenomenon, can be strengthened under the guidance of the doctor training. At this time to hold the baby should pay attention to the back of the baby’s head with a hand, to avoid the baby tilted back to injure the neck. However, if the baby’s head is tilted back after a long period of vertical holding, shaking, and even convulsions are caused by diseases, such as meningitis, cerebral palsy, trisomy 21, etc., we need to consult a doctor in time, complete the relevant examinations, clarify the cause of the disease, and then follow the doctor’s instructions for treatment.