Dry mouth during chemotherapy

The medical term is xerostomia. Saliva moistens food, protects teeth and gums, and helps control germs, so persistent dryness deserves attention even when it seems mild.

You may notice sticky or stringy saliva, thirst, cracked lips, a burning tongue, altered taste, difficulty wearing dentures, or food sticking while you swallow. Some medicines used alongside chemotherapy, dehydration, mouth breathing and previous treatment to the head or neck can add to dryness.

With less saliva, tooth decay, gum problems and mouth infection can develop more easily. Painful sores or swallowing difficulty may also reduce food and fluid intake. Tell the oncology team early so they can look for treatable causes and check the mouth.

Sip water regularly if your care team has not restricted fluids. Sugar-free gum or sweets may stimulate saliva when safe for you, while a water-based lip balm can ease cracking. Choose moist, soft foods and add sauces or gravies; limit tobacco, alcohol and foods that sting.

Clean teeth gently with a soft brush and the products recommended by your team. Ask whether a bland mouth rinse, saliva substitute, fluoride product or dental review suits you. Avoid alcohol-containing mouthwash and do not arrange invasive dental treatment during chemotherapy without coordinating with oncology.

Call your cancer team promptly if mouth or throat pain prevents drinking, eating or sleeping; if you cannot swallow fluids; or if you see spreading redness, swelling, pus, white patches or bleeding. Report fever or feeling suddenly unwell immediately using the temperature threshold and emergency instructions supplied by your oncology service.

Seek emergency help for trouble breathing, choking, severe swelling or signs of severe dehydration such as confusion or fainting. These problems need assessment rather than home treatment alone.

Ask whether your chemotherapy commonly affects the mouth, which rinse and toothpaste to use, and whether any current medicine contributes to dryness. Confirm how to reach a dietitian or dentist familiar with cancer treatment if chewing, swallowing or dental health becomes difficult.