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Life After Cancer: Oral Health Problems  

Cancer treatment often causes mouth problems or affects your oral health. It can cause problems such as sores, pain, infection, saliva changes, and dry mouth. Chemotherapy can cause problems in the mouth, no matter what kind of cancer it’s used to treat. Radiation treatment to the head and neck for cancer can cause problems, too. Some get better after treatment, but some can last for a long time after treatment is over.

Oral problems that can happen after cancer 

After cancer treatment, you may have some of these problems:

  • Sore, red, and inflamed areas inside the mouth (oral mucositis)

  • Infection from viruses, bacteria, or fungi

  • Salivary glands that don’t make enough saliva

  • Thick, sticky saliva

  • Dry mouth

  • Pain when chewing, speaking, or swallowing

  • Changes in the way foods taste and smell

  • Trouble with very hot foods, cold foods, or both

  • Cavities, tooth loss, or both

  • Stiff jaw muscles

  • Death of bone in the jaw (osteonecrosis)

  • Nerve pain that feels like a toothache

  • Bleeding

  • Thinned tooth enamel from vomiting

  • Chronic sores, blisters, and white patches after bone marrow transplant (oral chronic graft-versus-host disease) 

When you see your dentist 

Make sure to tell all your dental healthcare providers about your cancer treatment. This helps them plan any treatments you might need in the future. They will be careful around any problems in your mouth and watch for changes. They can also look for signs of new problems. Many times, they can help manage any long-term problems you have. 

Tell them if you had chemotherapy, radiation, or a bone marrow transplant. It may help to share your cancer treatment records with them. Each kind of treatment can cause different problems. For example, radiation can cause dry mouth, cavities, and tooth loss. This could lead to even more problems if you have to have oral surgery or teeth removed later on. Your dentist may have you use a fluoride to help keep your teeth strong and healthy.

Taking care of your mouth and teeth after cancer 

To help keep your mouth and teeth healthy, make sure to:

  • Gently brush your teeth, gums, and tongue with a soft toothbrush after every meal and at bedtime.

  • Gently floss between teeth. Avoid areas that are painful or bleeding. Check with your cancer healthcare provider to be sure it’s safe for you to floss.

  • Don't use toothpicks.

  • Use a daily fluoride gel if your dentist prescribes it.

  • Don’t use mouthwash that has alcohol in it.

  • Don’t smoke or chew tobacco.

  • Use a mouth-moistening rinse or spray to help keep your mouth moist.

  • Chew sugar-free gum or suck on sugar-free candy or lozenges.

  • Exercise your jaw. Gently open and close your mouth 20 times, 3 times a day to prevent stiff jaw muscles. Your dentist can teach you exercises that can help with pain and stiffness. 

Eating and drinking 

If you have pain or damage to your mouth or teeth, or have a high risk for cavities:

  • Eat soft foods, or foods moistened with sauce or liquid to make swallowing easier.

  • Take small bites and chew slowly.

  • Don’t eat salty, spicy, or acidic foods.

  • Don’t eat sharp, sticky, or rough foods.

  • Stay away from sugary foods, drinks, and gum or candy that has sugar.

  • Don’t drink alcohol.

Working with your dentist

After cancer treatment, you may have a high risk for cavities for the rest of your life. Talk with your cancer healthcare provider and your dentist to find out what you should do to take care of your mouth. Make sure to see your dentist often. Tell him or her about any new problems so they can be treated right away.

Online Medical Reviewer: Kimberly Stump-Sutliff RN MSN AOCNS
Online Medical Reviewer: Lu Cunningham
Online Medical Reviewer: Richard LoCicero MD
Date Last Reviewed: 2/1/2019
© 2021 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare provider's instructions.
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