Once we got an infected toenail from a not-so-hygienic nail salon in NYC. It was extremely painful to walk or to even put the lightest pressure on it and they need to go to an urgent care, have part of toenail permanently removed and missed a week of work. Six infections on three different toes is some spectacular hygiene neglect.
After tying off the toes with a rubber band to minimize bleeding, the doctor uses a scalpel to cut a long and deep incision on the sides of the nails and flesh.
Then using forceps, the professional removes the side of the nail along with the exposed and infected flesh. You can see how the purple color immediately disappeared.