The medical term used to explain a toenail that falls off is onychoptosis or onycholysis, which just indicates a separation of the nail from the nail bed. This phenomenon is normally an outcome of a fungal infection or a traumatic injury.
Toe Fungus: Is It Contagious?
Yes, toenail fungus is contagious. You have to catch it from somewhere– while it might look like it just appeared by itself from no place, if you have actually got toenail fungus then you’ve entered into contact with someone else who is infected.