Suddenly black toenails may be related to extrusion, trauma or related diseases.
1. Extrusion or trauma: toenails suddenly turned black may have been extruded or traumatized, such as toenail impact, or long time wearing ill-fitting shoes, strenuous activities after the toes are extruded to form local blood circulation obstacles caused by toenail bruising, which led to toenails suddenly turned black.
2. Related diseases: If you suffer from toenail pigmented nevus, melanoma or onychomycosis and other related diseases, toenail blackening may occur.
Toenails suddenly turned black a piece of other reasons, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor for symptomatic treatment.