Heel PainAn ingrown toenail is a common condition that occurs when the toenail edge grows into the skin of the toe. Usually this occurs due to aggressive nail trimming, genetics or shoes that irritate the nail/skin junction. An ingrown toenail can be painful and lead to infection. Nail border trimming may relieve a mild ingrown toenail. For a long standing or severely ingrown toenail, permanent treatment usually consists of removing the ingrown toenail border and its growth center. This is performed as an office procedure.