Welcome Pamela. The radiation treatments sounds like "accelerated fractionization" treatment, and is used for better tumor control, in a shortened time period of 6 weeks rather than the Standard fractionization of 2Gy per day, 5x a week for 7 weeks with total dosage at 70Gy. As such, you will have be getting more radiation of about 75Gy. This has acceptable toxicities with better tumor contol, being the tumor cells not have a chance to repopulate, but may have more skin and mucosal problems than usual with this.

The hospital should have a nutrionist speak with you regarding adequate nutrition, and hydration, especially protein for healing. The radiation Oncologist will advise what creams to apply to the neck, mine recommended Aquaphor, pain meds, and mouth rinses, basically salted warm water with baking soda, and some, Magic Mouthwash, and others. Oral care is imperative before, during, and after

Good luck with everything.