Does radiotherapy treat mouth cancer?

Mouth cancer, also called oral cavity cancer, can involve areas such as the tongue, gums, inner cheek, or roof or floor of the mouth. Radiotherapy may target the tumour, the surgical area, or nearby lymph node regions. It can be used after surgery when the team wants to treat the planned area, or alongside medicines in selected situations. The choice depends on the tumour’s site and extent, surgical findings, lymph nodes, general health, and the aim of treatment. Because the mouth is sensitive, effects may include soreness, dry mouth, taste changes, thick saliva, or difficulty eating. A dental and nutrition review can make treatment safer and more manageable.

Arrange the dental checks recommended by your oncology team before treatment, and ask about fluoride or mouth-care measures. Tell the team about loose teeth, dentures, mouth ulcers, swallowing problems, or medicines that affect healing. Use only mouth rinses and pain relief they recommend. Choose soft, nourishing foods and drink regularly if chewing becomes uncomfortable; a dietitian can suggest alternatives when intake falls. Report mouth sores, reduced drinking, or weight change early, because treatment adjustments and supportive care may help.

Seek urgent help for severe breathing difficulty, uncontrolled bleeding, or inability to swallow saliva. Contact the cancer team promptly for fever, facial or neck swelling, pus, worsening mouth pain, or inability to keep fluids down. These signs can indicate infection, dehydration, or another complication requiring timely assessment.

What part of my mouth and neck will be treated? Is radiotherapy replacing surgery, following it, or combined with medicines? What dental work should be completed beforehand? How will you support eating, swallowing, saliva, and pain control? Who should I call outside clinic hours?