Mouth cancer is a serious disease affecting the lips, tongue, gums, cheeks, and throat. Common symptoms include persistent mouth sores, bleeding, loose teeth, difficulty swallowing, lumps, pain, numbness, and red or white patches. Major risk factors include smoking, tobacco use, and excessive alcohol consumption. Early detection can improve treatment outcomes. Treatment may include surgery, radiation therapy, chemotherapy, or targeted therapy. Regular dental checkups are important, especially for people with tobacco or alcohol habits, to detect changes early and receive appropriate treatment.