How long can the swelling of the patient’s head accidentally knocked out of the bag, based on the severity of the bag and whether the patient is properly handled and other factors, to carry out an objective analysis: 1, if the volume of the patient’s head knocked out of the bag is small, accompanied only by mild local swelling and pain, the patient can reduce tissue exudation through local ice, combined with local massage, hot compresses, external rubbing blood circulation and stasis cream, etc., can promote the absorption of the bag faster and relieve pain symptoms. This can promote faster absorption of the mass and relieve the pain. In about 5-7 days, the local mass can be completely absorbed and the swelling can be reduced. 2. If the patient has obvious symptoms of head bump, accompanied by extensive blood stasis and pain. Patients do not have timely ice or heat treatment, in this case the mass will progressively increase, resulting in local infection or even the formation of abscesses, which take 2 weeks to absorb on their own.