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Mouth sores caused by cancer treatment: How to cope

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By Mayo Clinic Staff

If you're about to start cancer treatment, know that certain treatments can cause mouth sores. The term that healthcare professionals use for mouth sores is oral mucositis.

Mouth sores can hurt and cause discomfort. They can range from minor problems to severe complications. They could make you stop your cancer treatment. These sores can make it hard to drink and could make you lose weight because you can't eat enough.