Whether the nail cap can be recovered after being pressed off by the machine mainly depends on whether the nail bed is damaged or not, if the nail bed is intact and not damaged, the nail will be recovered gradually in the later stage; on the contrary, it cannot be recovered. 1. If there is no obvious damage to the nail bed after the nail cap is crushed off by the machine, the damage is generally not serious, and with the gradual growth of the nails under the nail bed, the nails will gradually recover; 2. If the nail bed is partially damaged, the nail cannot grow from the damaged area; if the nail bed is completely separated when the nail is crushed off by the machine, the nail cannot be recovered and can only be replaced by scar tissue. If the nail is crushed off by a machine, the nail cannot be restored and can only be replaced by scar tissue. The nail cap needs to be treated as soon as possible by the hand and foot microsurgery department to avoid post-injury infections, and if necessary, the nail bed needs to be repaired. Recovery of the nail after surgery usually requires at least 3 months of recovery.