It can take months to grow back, but if you have damaged the nail matrix, it may never do so. If your matrix is slightly damaged you may have a distorted looking toe nail - thick or crimped, perhaps.
Yeah I lost my wedding ring finger nail in a totally bizarre accident.My wee sister used to bump along on her bum instead of crawling when she was a baby and I was sitting on the floor and she landed on my hand and bumped and took my entire nail out.I fainted -well you would -uit its surprising how long your nail is -its about half again and goes into a point..Didnt take a huge amount of time to grow back in -but yip it did grow back in ridged.
Yes they do grow back. i used to do alot of running (not so much now!) and my toe nails used to fall off!!! It was really strange! but they always grew back! Also tho, i have a mark on my big toe nail that wont go and even when i lose the nail and it grows back, the mark is still there!