Anything is possible, but it's probably 100% likely that head and neck cancer patients will have mucostis, that can lead to inflammation, ulcers, fom radiation anyway. With ulcers, you have to be careful with bacteria entering the blood steam through them, so let the doctor know, and may be issued proper medication to treat, and can be associated with a bacterial, viral or a fungal infection. Also, be careful with hot, spices, sharp textured food that can irritate the mouth, cause cuts in the mouth. Do you have Magic Mouthwash to rinse with? I heard of some with good results to help prevent mucocitis with GelX. I used aloe vera juice to rinse with too, which helps in healing. I hope this helps.