Basketball toenails are extruded and blackened with bruises, which is a symptom of subnail hemorrhage, painless and small area without treatment, severe pain and large area of the feasible surgical treatment. Subnail hemorrhage, i.e., bleeding under the nail plate, occurs in the thumb and big toe, and is commonly seen after traumatic injury, such as heavy object smashing, extrusion and so on. For those who have no obvious pain and the bleeding plaque is small, the dried blood clots can be pushed out by themselves with the growth of nails, and no special treatment is needed. For those with obvious pain and large bleeding plaques, decompression surgery is required to treat the hematoma by puncturing and draining the hematoma using a sterilized needle. If the bleeding is extensive and the nail plate may separate from the nail bed, nail extraction and regular dressing changes are required to promote healing of the nail bed. After some time, the new nail plate will gradually cover the nail bed. Basketball toenails are extruded bruising black serious, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.