The hard bag after the baby fell to the head may be the formation of some liquid not absorbed by the cells of the impact site, overflowing to the subcutaneous; and soft bag is generally the hematoma caused by the rupture of the external subcutaneous blood vessels of the head, for the specific difference between the hard bag and soft bag after the fall to the head can also be analyzed from the nature, severity and other aspects. 1, nature: the formation process of the hard bag and soft bag is different, the composition of which is also different, hard bag Inside is mostly water, generally because after the fall to the head injury to the brain dura, edema occurred. The soft bag is mostly due to the rupture of capillaries after the fall to the head bleeding, blood pooling under the skin and the formation of hematoma; 2, the severity: the hard bag usually invades the dura mater, even to the bone, the formation of the hard bag is relatively more serious, recovery time is also longer. The soft package is due to local bruising, so generally after the hematoma is absorbed, it will gradually ease. When the baby fell to the head after the formation of hard or soft bags, there is no specific criteria for judging, so when the baby’s head bumped out of the bag, must not use the hand to press and rub, in order to prevent aggravating the head discomfort, can be iced within 48 hours, after 48 hours and then hot compress, help recovery.