The phenomenon of blackening after a toe fracture is mostly due to the fact that after a toe fracture, it will affect the local blood flow and local bleeding, which will form local bruises and not be absorbed in time, resulting in the appearance of local bruising and blackening of the skin. The patient can give hot compress treatment, such as using towel hot compress, external blood pain relief cream, can improve the restoration of blood circulation in the injured area, promote the absorption of local bruises, can reduce this phenomenon. After a toe fracture, if the patient has a combination of toe artery injury and peripheral blood circulation disorder, blackening may also occur. When a toe fracture becomes black, emergency surgery should be performed in a timely manner for vascular exploration and repair, and internal fixation of the fracture site should be used.