I cut my left nails shorter, and briefly filed them smooth. If it hurts to cut them that short, cut them as short as you can reasonably tolerate first. Wait a few days and cut them again. You can tell when you can cut agian by pushing on the nail. If it hurts, wait longer. Your fingers will adjust so the short nails are not painful. If your nails are short enough the grooves in your fingers don't matter.