Mouth cancer refers to cancer that develops in any of the parts that make up the mouth. Mouth cancer can occur on the lips, gums, tongue, inside lining of the cheeks, and the roof and floor of the mouth. Cancer that occurs on the inside of the mouth is sometimes called oral cancer or oral cavity cancer. Mouth cancer is one of several types of cancer grouped in a category called head and neck cancers. Mouth cancer and other head and neck cancers are often treated similarly.
Signs and symptoms of mouth cancer may include: