Rolanda, welcome to the site. Sorry you had to find us, but perhaps we can assist. There are many disorders of the mouth caused by rad/chemo treatments, from thrush to mucous issues to teeth issues to who knows what. Have the doctors checked for all of the normal things? Did your husband have a feeding tube during rad and is he still on it? By 4 months, I still had some issues, but nothing like you are describing. There has to be something causing it, have you seen a pain management doctor? What are some of the complications your husband experienced? Was he treated at a major cancer center? If not, you might want to visit one to discuss this with specialists that see hundreds of these cases in a year. Hope someone else can give you better information and will pray for relief for your husband.