 [ Symptoms ] how should i treat the nail bed when a toenail falls off  i jammed my big toe into a door and it turn black and blue almost immediately now it is four months later and it appears that nail is about to fall off it there something i should do in the way of treating the nail bed when the nail separates ointments salves etc [ Disease ] just protect it from re injury the nail bed may be more sensitive keep in mind that there may be a brand new nail already present underneath the damaged black one if you did not injury the nail matrix the cells that grow a new nail you may have a pleasant surprise of finding a fresh nail covering the nail bed after four months