 10 head and neck cancer patients with xerostomia following radiotherapy will be assessed for severity of xerostomia using questionnares and quantitative salivation tests. patients responsive to citric acid will receive a hypnotic session with specific suggestion for salivation. saliva volume will be assessed pre and post hypnosis. patients will receive a CD with recorded hypnotic session to use freely at home. xerostomia will be assessed using a questionnare one week following hypnosis. 