Causes
Oral cancer occurs when cellular DNA mutations occur in the mouth or on the lips. The DNA in your cells contain information that tells the cell how to function. When mutations occur, it changes the information in the cell, which tells the cells to keep growing and dividing when the healthy cells die.
The accumulated abnormal mouth cancer cells will form a tumour. After a while, the cells may spread throughout the mouth and other neck and head areas, including other body parts.
Oral cancers usually start in the flat, thin cells (squamous cells) that line inside the mouth and lips. This means that oral cancers are squamous cell carcinomas. The cause of the squamous cell mutations that result in oral cancer is still unclear, but healthcare professionals have identified some risk factors that increase the risk of oral cancer.