If the toe is blackened and necrotic, it may be due to diabetes or trauma. An arterial stent needs to be implanted to relieve the blackening symptoms or the necrotic portion needs to be removed to prevent other toes from becoming necrotic, as recommended by your doctor. In diabetic patients, necrotic blackened toes are mainly caused by diabetic peripheral neuropathy. Patients can have an arteriogram to determine the severity of the stenosis. If necessary, balloon dilation and arterial stenting can relieve the stenosis as well as the symptoms of blackened toes. If the foot is impacted, which may lead to subcutaneous bruise formation in the toe area, patients can use arthrotomy, and if arthrotomy does not ensure functional mobility and there is a possibility of continued progression, the removal of the entire toe and reconstructive surgery need to be considered. Because the operation to remove the toe is a relatively large operation, and the toe is also an important part of walking. Therefore, patients are advised to stay in bed as much as possible to avoid the possibility of wound dehiscence or infection.