Oral head and neck cancer is a type of cancer that begins in the moist, lining cells (squamous cells) of the mouth, throat, and voice box. It is primarily linked to tobacco use, excessive alcohol consumption, and infection with the Human Papillomavirus (HPV). Common signs include a persistent sore or lump in the mouth or throat, white or red patches, and difficulty swallowing. Treatment typically involves surgery, radiation, and chemotherapy. Early detection is key to successful treatment.