Oral cancer is the uncontrollable growth of cells that invade and inflict damage in areas involving the lips, tongue, cheek lining, floor of the mouth, gingiva, and palate. Men are twice as likely to have oral cancer, specifically men over the age of 40. Risk factors include smoking/tobacco use; heavy alcohol use; chronic irritation from rough teeth, dentures, or fillings; human papilloma virus infection; family history; excessive sun exposure; taking immunosuppressants that weaken the immune system; and poor oral hygiene.