Children’s head accidentally bumped into a bag, you can reduce the swelling by cold compress, hot compress, medicine and other ways, as follows. 1. Cold compress: use cold towel to apply cold compress locally for 20~30 minutes within 72 hours after the bump, and put a layer of cotton cloth on the skin surface to promote the contraction of broken small blood vessels and reduce the internal oozing and seepage; 2. Hot compresses: hot compresses can be applied after 72 hours, such as hot towels, to promote local blood circulation and accelerate the absorption of local bruises; 3. medication: follow the doctor’s instructions to use medication to activate blood circulation and eliminate blood stasis (e.g. Yunnan Baiyao aerosol, etc.), which can activate blood circulation and eliminate blood stasis, reduce swelling and relieve pain. In addition, if the child’s head has skin breakage and bleeding, go to the hospital in time for sterilization, and be bandaged by medical personnel. And also need to observe whether the child nausea, vomiting, poor mental health, there is no drowsiness, etc., if these conditions, need to go to the hospital as soon as possible to rule out intracranial hemorrhage.