 Radiation treatment is very effective for treating cancers of the head and neck, however, during the course of treatment, it is common for patients to experience soreness of their mouth and throat due to the radiation. When radiation causes inflammation of the inside of the mouth, it is called mucositis. There are several mouthwashes that are commonly used to prevent and treat mucositis, but none of these have been shown to be superior to another. This study is being conducted to see if using a combination of magic mouthwash and sucralfate is better than using a single mouthwash called benzydamine at decreasing the burden of mucositis. 