This condition is most often considered to be due to a fungal infection that causes gray nails. The nail plate suffers from fungal infestation, which causes yellowing of the nail plate. The fungus destroys the cuticles of the nail plate, thickening the nail and then slowly shedding it, which can cause it to become hollow. Once this symptom is detected, prompt treatment of gray nails is required. The main clinical treatment is with antifungal drugs, such as Trofen Hydrochloride cream, bright nail and other drugs. Patients should pay more attention to maintaining hygiene around the nails, cut nails and wash hands regularly.