If the toe joint becomes black, it is recommended to go to the hospital for examination and promptly find the cause for appropriate treatment to avoid delaying the diagnosis and treatment. Black toe joints, consider toe joint disease, common such as acute injury to the joint or long-term joint chronic strain, can also be due to toe joint skin contact with poor stimulation, resulting in poor local blood circulation or skin hyperplasia pigmentation, may appear toe joint blackening. In the most severe cases, the blood circulation in the toe joints is restricted, resulting in the darkening of the skin due to lack of oxygen and ischemia. Darkening of the skin due to injury, strain, or irritation can be quickly relieved by removing the cause. Therefore, you should go to the hospital for examination to avoid serious consequences.