The separation of the nail from the flesh is usually a nail separation disorder, which may be associated with trauma, onychomycosis, or the development of subungual warts. When the nail is traumatized, such as by impact or severe compression, the nail may detach from the nail bed very quickly or blood may accumulate under the nail due to compression, and the nail will gradually detach after a period of time and be replaced by a new nail growth. Ringworm infection can cause onychomycosis. Nails infected with ringworm will have discoloration, lack of luster, shrinkage or loss, and the nail plate infection will be cracked and brittle. When subnail warts are caused by viral infection, warty growths appear below the free edge of the nail, which can destroy the nail bed and separate the nail. If there is a change in nail traits or separation of the nail from the flesh, it is recommended to consult a doctor for a clear diagnosis and symptomatic treatment.