There are many possible causes of back pain. Is the pain in the upper or lower back? If lower back, and especially if your patient has dry mouth as well, I would definitely suspect dehydration. Several of my clients with low-back pain have found that it was due to chronic mild dehydration -- common in PD. Drinking 6-8 glasses of water daily relieved the problem for them. Best regards, Kathrynne > As a nurse working with PWP's I need help please!! > I have a patient experiencing quite severe episodes of back pain. -- Kathrynne Holden, MS, RD "Nutrition you can live with!" Medical nutrition therapy http://www.nutritionucanlivewith.com/ Tel: 970-493-6532 // Fax: 970-493-6538 "If we knew what it was we were doing, it would not be called research, would it?" -Albert Einstein