If the purple blood is small, do not worry too much, this is due to the local wound rupture, there is capillary bleeding caused by. You can apply cold compresses within the first day after the appearance of purple blood, which can reduce tissue bleeding, and change to hot compresses after one to two days, which can promote the absorption of the hematoma, minimize local activities, do not get wet, and eat foods that can help absorb the hematoma, such as fresh vegetables, fresh fruits, and high quality protein with low fat and cholesterol content, such as fish and shrimp. However, if there is more purple blood, local throbbing pain and inability to move, you need to go to the hospital’s surgery or emergency department for disposal in time. If necessary, the nail needs to be cut open under local anesthesia to release the blood, and regular drug changes will be performed later. You should not drink alcoholic beverages and try not to smoke until the area has recovered.