Polydipsia is possible to rule out psychogenic polydipsia or habit polydipsia. Polydipsia is a symptom (evidence of a disease state), not a disease in itself. As it is often accompanied by polyuria, investigations directed at diagnosing diabetes insipidus and diabetes mellitus can be useful. Blood serum tests can also provide useful information about the osmolality of the body's extracellular fluids. A decrease in osmolality caused by excess water intake will decrease the serum concentration of red blood cells, blood urea nitrogen (BUN), and sodium. Polydipsia Polydipsia is excessive thirst or excess drinking. The word derives from the Greek () "very thirsty",
Osteopathic medicine in the United States states with the lowest concentrations of DOs are Louisiana, Massachusetts and Vermont where only 1–3% of physicians have an osteopathic medical degree. Public awareness of osteopathic medicine likewise varies widely in different regions. People living in the midwest states are the most likely to be familiar with osteopathic medicine. In the Northeastern United States, osteopathic medical physicians provide more than one third of general and family medicine patient visits. Between 2010 and 2015 twelve states experienced greater than 50% growth in the number of DOs—Virginia, South Carolina, Utah, Tennessee, North Dakota, Kentucky, South Dakota, Wyoming, Oregon, North Carolina, Minnesota, Washington.