Recently Underwent Chemotherapy. Nodules On Both Sides Of Head. Painful. Tongue Swollen. Food Tasteless, Weightloss. Suggestions?

My Mother has recently under gone Chemo therapy(last dose was in Oct) and lung surgery (Lobe ectomy). She has no problems breathing everything seems good as far as the surgery is concerned. She now says she has some type of nodules on each side of her head and it is painful to the touch. The pain is also in her neck, jaw, teeth hurt, now she says it feels as if her tongue is swollen. She still has problems with her food having no taste, as a result is not eating well and continues to loose weight. Surgery was Dec 20th she is still on the morpine, and oxycoden.