Hi Linda,
Mucositis is/are the sores that form inside your mouth and on your tongue as a result of radiation. They hurt like hell, but usually don't last long. You may need some lidocaine and lortab elixir (liquid Vicodin) to get through that time. I actually needed the fentanyl patches for two weeks.
Riley

dx 2/13/06. modified radical neck dissection 3/9/06 multiple biopsies of upper airway and direct laryngoscopy. 1 of 47 lymph nodes positive for metastatic undifferentiated carcinoma (lymphoepithelioma). Unknown primary. Finished radiation 5/24/06.