"Tight shoes can compress your toes, forcing the flesh into the nail," says Jenny Salazar, a nail technician in New York City. Another culprit: Nails that are too short and curved in at the corners ...

You may experience pain, discomfort, and infection with a curled toenail. Ingrown toenails are common and often affect your big toe. Emergency care may be needed if you notice red streaks on your ...