Fingernails that are turned out and upturned may be associated with onychomycosis and psoriasis, which require antifungal and glucocorticosteroid medications, respectively. 1. Onychomycosis: commonly known as “gray nails”, it is a disease caused by nails infected with ringworm, and the main treatment is to give highly effective antifungal medication, such as topical amorphophallus powder, oral itraconazole dispersible tablets and so on. 2. Psoriasis nail: psoriasis is a chronic scaly skin disease, nail lesions are more common in psoriasis, in the treatment of which glucocorticoid drugs can be used for sealing treatment, such as floridone acetate ice cream. It can also be combined with oral medications such as Avitamin A and methotrexate. Due to the different causes of the disease, the treatment may vary to some extent, and a doctor’s consultation is required for specific cases. The above medications should be used as prescribed by your doctor.