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Let's face it, warts are not pretty. It's bad enough to have these flesh-colored growths on your feet or hands, but warts under your nails can interfere with your manicures and nail health. Common warts are caused by HPV, the same virus that can cause genital warts and cervical cancer, but don't freak out; warts under your nails -- called subungual or periungual warts -- are generally harmless. The real challenge is accessing the growths in order to treat them, but let's call it an adventure instead. With the right treatment, your hands and toes will be smooth and sexy again.