Toenail and flesh separation inside the empty painless, consider and nail fungal disease, subnail warts and many other reasons. 1. Nail fungus disease: for fungi caused by the subnail tissue or nail plate infection, mainly caused by dermatophyte infection, mostly caused by tinea pedis direct infection, fungal invasion of the distal front edge of the nail and the side edge, can make the nail thickening, turbidity, nail separation. 2. subnail warts: in the human papilloma virus infection of the skin mucous membrane, can appear skin redundancy, occurring in the nail bed, called subnail warts, can be the top of the nails, have nail separation. The actual warts can be a part of a person’s body, and they can also be a part of a person’s body, and they can also be a part of a person’s body.