Third edition. Based on the author's clinical and scientific research into the role of water in the body, the book explains the discovery that Unintentional Chronic Dehydration (UCD) produces stress, chronic pains and many degenerational diseases. It describes signals of thirst beyond dry mouth and advises adjusting water intake (natural, pure water) to help prevent or reduce conditions such as asthma, allergies, heartburn, back pain, arthritis, colitis pain and migraine headaches, and to promote healthier, pain-free living.