Children knocked on the back of the head a bag can be selected according to the severity of different treatments, the more mild can be through the ice to relieve the symptoms, if the more serious, you can consult a doctor in a timely manner, if necessary, through the puncture to deal with. Knocked to the back of the head up a bag if relatively light, you can first give the bag up the place of sexual ice packs, can help the contraction of capillaries, reduce swelling, reduce blood seepage, two or three days later can be relieved. If the baby also combined with vomiting, poor spirit and other symptoms, need to consult a doctor in a timely manner, improve the imaging examination, clear with or without intracranial injury, if the bag did not subside for a long time, if necessary, can be dealt with by puncture, can be the bag of fluid, blood pumping treatment, and then localized compression bandage, to help recovery. It is recommended that the child bumped into the back of the head and the bag should go to the hospital for a checkup to assess whether there is any intracranial hemorrhage, fracture and so on.