Mouth cancer refers to cancer that develops in any of the parts that make up the mouth (oral cavity). Mouth cancer can occur on the:
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 cancers grouped in a category called head and neck cancers. Mouth cancer and other head and neck cancers are often treated similarly.
Lip cancer may appear as a sore on your lip that doesn't heal.
Mouth cancer signs may include bleeding, swelling, white patches or redness in your mouth.