10 Causes of Mouth Ulcers
Cause #4: Radiotherapy
Radiotherapy to the mouth can also result in the development of radiation induced stomatitis. This causes ulceration and mucosal erosions. Irradiated salivary glands also cause xerostomia or dry mouth, which makes the oral mucosa more vulnerable to friction as there is less saliva for lubrication purposes.
This makes the breach of epithelium to be more likely. Radiation also damages and impairs the blood supply making it harder for the ulcers to heal.
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