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",
Shared decision-making in medicine that barriers to SDM may include a patient's desire to avoid participation from lack of perceived control over the situation, a medical professional's inability to make an emotional connection with the patient, an interaction with an overconfident and overly-assertive medical professional, and general structural deficits in care that may undermine opportunities for a patient to exert control over the situation. Furthermore, dispositional factors may play an important role in the extent to which a patient feels comfortable with a participating in medical decisions. Individuals who exhibit high trait anxiety, for example, prefer not to participate in medical decision-making. For those