The condition described as wasting-thirst in Donguibogam closely parallels modern diabetes. In particular, thirst and urinary frequency are among the primary signs that warrant evaluation for diabetes. These symptoms occur when hyperglycemia—an excessive amount of glucose circulating in the blood—persists over time. Normally, insulin secreted by the pancreas helps move blood glucose into cells to be utilized for energy. Problems arise when insulin cannot function properly due to insulin resistance, or when the pancreas cannot produce enough, resulting in insulin deficiency.
When blood glucose rises, the body attempts to eliminate the excess glucose. The primary organs responsible for this process are the kidneys. The kidneys filter the blood, turning waste products into urine while reabsorbing essential nutrients. However, when blood glucose levels are excessively high, the kidneys cannot complete the reabsorption of all glucose, allowing it to spill over into the urine. Because glucose naturally draws water with it, a substantial volume of fluid leaves the body alongside the sugar. This is the physiological cause of polyuria, characterized by frequent urination with large volumes.
As fluids continuously drain from the body, dehydration develops, triggering intense thirst as a compensatory response. This leads to continuous water consumption, creating a cycle where drinking more water leads to more urine output. This severe, persistent thirst is termed polydipsia. Meanwhile, because glucose cannot properly enter the cells, the body perceives an energy shortage and continually demands food, a symptom known as polyphagia. Together, polyuria, polydipsia, and polyphagia constitute the classic three symptoms of diabetes.
These symptoms should not be brushed aside as simple fatigue or water intake habits. Sustained hyperglycemia can cause severe systemic complications over time, affecting not only the kidneys, but also the eyes, nerves, and cardiovascular system. Because symptoms can be mild or absent in the early stages, careful attention is necessary. If you find your thirst intensifying and bathroom visits increasing, it is prudent to visit a clinic for a blood glucose test.
