Nail cap falling off may be due to trauma, fungal infection, etc. It is recommended to take bandage and change medicine, medication and other ways of treatment according to different situations. 1. Trauma: If the nail cap falls off due to strong external pressure or impact, it can be recovered by itself if the nail bed is not damaged, but we should do a good job in taking care of the traumatized surface and the nail bed, avoiding infection, and changing the medicine in time, preventing infection and waiting for the nails to recover by themselves. 2. Fungal infection: Nail fungus caused by fungal infection can also lead to nail loss. The need for antifungal treatment, oral itraconazole and other drugs under the guidance of the doctor. It is recommended to go to the hospital in time, under the diagnosis of the doctor to clarify the cause, to take the appropriate way of treatment, and follow the doctor’s instructions to use medication.