Toenail caps falling off can be caused by external forces, fungal infections, and other factors. Most toenail caps fall off and can usually grow back.
External force: The toenail is subjected to external force, such as friction, extrusion, collision, etc., which may cause the toenail cap to fall off. As long as no visible damage has formed at the nail bed area, most of them can grow back on their own over time.
Fungal infection: Fungus invades the nail plate and nail bed, resulting in changes in the color, texture, and character of the toenail, which may lead to the loss of the toenail cap. If you are sure that it is caused by fungal infection, you can give ketoconazole, miconazole nitrate and other antifungal drugs under the guidance of the doctor, and the toenail may grow out gradually.
To summarize, toenail cap off, most can grow back gradually. There are also some nail beds that are more seriously damaged, and it may be difficult to grow a normal toenail. Therefore, after the toenail is injured, no matter whether the nail bed is injured or not, it is best to go to the dermatology department of the hospital for examination and ask the doctor to make a judgment.