Unless the area of bleeding is very small, an affected nail will usually fall off on its own after several weeks because the pooled blood has separated it from its bed. A new fingernail can regrow in as little as 8 weeks. A new toenail may not fully regrow for about 6 months.

What happens when your thumb nail falls off?

After a nail separates from the nail bed for whatever reason, it will not reattach. A new nail will have to grow back in its place. Nails grow back slowly. It takes about 6 months for a fingernail and up to 18 months for a toenail to grow back.

Why is my thumbnail coming off?

Simply tapping nails repeatedly for a long time can cause the nail to separate from the skin. Injuries such as slamming a finger in a car door or stubbing a toe may also cause onycholysis. Some other typical causes include: reaction to chemicals, such as nail polish, nail polish remover, or household cleaners.