Always cut toenails straight across, leaving the edges longer and squared off. If you don't you are looking for the inevitable "ingrown toenail"! If you do end up suffering from such condition, clean the nail with anti-bacterial soap and warm water, pat dry and carefully pack under the sides of the ingrown area using an orangewood stick, cotton that has been soaked in rubbing alcohol. This will steralize the irritation/infection and lift the corners upward as your nail is growing out, avoiding any further inward growth. This really works!! Remember to always consult with your doctor as this could lead to a serious problem!