This really does work. I have been using this method for 13 years and only get an ingrown toe nail when I forget to re-cut the notch.
I recently had to use this remedy on one of my kids and thought I would share it. My grandma who is now 97 years old taught me it when I was little. You simply cut a v out of the center of the toe nail with small clippers. It takes an hour or two for the relief to start being felt and with in a day or two the pain will be gone. The v causes the nail to start growing towards the center and away from the sides.