Ingrown toenails can be extremely painful and expensive to have removed. Here's a remedy that you can try for home removal.
Before you go to bed, put a small wedge of lemon on the toenail, securing it with a band-aid. (put on a sock!) When you wake up, the nail should be soft enough to ease it away from the skin so that you can trim it. Always cut the nail straight across and not any shorter than the toe.