Nancy, if I read your post correctly, your sister is just 3 weeks out of radiation. If that is true, then she is likely to continue to experience pain for awhile. The peg wil help IF she can't keep up nutritionaly by mouth. In my opinion, athe most helpful thing for her will be to be adamant about adequate pain control so that she can rest, eat and drink. Does she have mouth rinces, and breakthrough pain meds. as well as an ongoing pain med? What she is feeling is pretty par for the course- be assertive with her Docs. Amy in Oz