Blackening of gray nails may be caused by disease development, nutritional deficiencies, environmental factors and other reasons.
1. Disease development: gray nails are caused by fungal infection of the nail bed, also known as nail fungal disease, with the development of the disease process, the patient’s nails appear discoloration (black, green, yellow, etc.), thickening, fracture and so on, blackening is one of the cases.
2. Nutritional deficiencies: the nails of patients with gray nails can not get enough nutrition because of the damage caused by the fungus, the subnail tissue is damaged, the color of the nails becomes darker, and with the prolongation of time, the nails gradually become black.
3. Environmental factors: gray nail patients’ nails are in a warm and humid environment for a long time, aggravating the condition and causing the nails to turn black.
There are other reasons why gray nails may turn black, so it is recommended that patients go to the hospital for medical treatment to clarify their condition and standardize their treatment.