If you notice a painful bump on the roof of your mouth, it could be an abscess—an infection that forms when bacteria invade ...

Lip cancer is an oral cancer that first develops on the lips, usually causing an open sore or painful lump. Initial warning ...

Oral squamous cell carcinoma begins in the squamous cells, which are the cells that line the lips and the inside of the mouth. Symptoms can include sores or a lump in the mouth, a sore throat, and ...