I almost went this route but I was successful with an alternative method recommended by my physician. What I did was clean the area really well every morning and every night, then ball up a small piece of cotton and gently wedge it under the ingrown side of my toenail. Of course I put some sort of ingrown toenail medicine on the cotton. This "trained" my toenail to grow the way that it is supposed to grow. It also offered temporary relief by lifting that pointy edge just a little bit.

Once the toenail lifted enough for me to trim it, I snipped the edges off that were puncturing my skin.

Don't forget to remove and replace the cotton though unless you want a nastier infection that you might already have.

Actually, steve-d's suggestion would probably be the best for you. Once and done. I was just a pansy.