It's a good idea to have your doctor check your warts. That way they can rule out any other skin problems. Sometimes a callous, a corn, or even a skin cancer can look like a wart. But the treatments may differ. Treatment can also provide relief from warts that bleed, burn, hurt, or itch. Genital warts should always be treated. They can spread to other people through sexual contact. And they may cause genital or cervical cancer.