It is not normal for small children to fall asleep, which may be related to poor posture when sleeping, inappropriate pillows, cold neck and other factors. 1. Poor sleeping posture: children sleeping in a poor posture, the neck is often in the position of excessive rotation, it is easy for children to fall asleep. 2. Inappropriate pillows: Parents choose inappropriate pillows for their children, such as pillows too high and too hard, resulting in the head and neck in the state of overstretching, which may make one side of the muscle overstretching, and it is easy to cause pillow fall. 3. Neck cold: not paying attention to indoor warmth at night when sleeping, may lead to children’s neck cold, so that the neck muscle vascular spasm, can cause pillow. Parents should do a good job in the daily protective measures to avoid the child sleeplessness, the child has the symptoms of sleeplessness, medical examination and treatment.