Mouth cancer, also known as oral cancer, is a tumor that develops in any part of the mouth. It can occur on the surface of the tongue, the roof of the mouth, inside the cheeks, the lips, or gums.
Cancer cells grow and multiply faster than normal cells. Mouth cancer can grow by spreading to nearby tissues of the surrounding skin. This tumor can also develop in salivary glands and tonsillitis symptoms. However, these are less common. Smokers and heavy drinkers are at higher risk of mouth cancer.