Dry mouth, frequent thirst, more urination esp at night. Lower left back pain above waist. Prostate checked digitally in Sept. Okay. Kidney? Diabetes?

See your doc. You present a case that could be diabetes. You need a work up to determine the correct diagnosis so you can correct or manage the situation. Dry mouth can cause tooth loss and bad breath. Diabetes is associated with many systemic problems. Schedule your doc appointment ASAP.