It is best not to bleed the blackened finger to avoid infection, but to treat it according to the severity of the bruise. The treatment of blackened finger bruises requires different treatment methods depending on the amount of bruises and the degree of injury. If the degree of injury is light, only with local soft tissue injury, bruising is narrow, the injury can be first by local ice for 24 hours, 24 hours after the use of blood circulation and stasis cream external, oral bruising pill, to promote the absorption of local bruising. Some patients in a week or so bruising can subside on their own. If the finger crush injury is serious, accompanied by local fracture, while the extent of bruising is larger, even accompanied by local active bleeding. In this case, the patient needs to improve the local X-ray examination as soon as possible to clarify the specific situation of the fracture, and take surgery as soon as possible, while strengthening anti-infection, dehydration and other supportive treatment, which can promote the local swelling and bruising to subside more quickly. During the treatment period, the patient should eat a light diet with more fresh fruits and vegetables, and also pay attention to personal hygiene and do not touch the bruised area.