Normal urine volume is 1000-2000ml per day, with an average of 1500ml, and if it often exceeds 2500ml, it is considered polyuria. The common situation is now introduced to everyone, and we hope that those who have the situation will take it seriously.
(1) Physiological polyuria: such as the intake of too much water or food containing more water; and after the use of diuretics, polyuria can occur for a short period of time.
(2) Pathological polyuria.
Here we consider three aspects: 1. Endocrine diseases: such as uremia, diabetes mellitus, primary hyperparathyroidism, primary aldosteronism and many other diseases. The above diseases have different accompanying symptoms that help us to make a diagnosis of the disease. For example, polyuria accompanied by irritable thirst and drinking and low specific gravity urine is seen in urolithiasis; polyuria accompanied by excessive drinking and eating and wasting is seen in diabetes; polyuria accompanied by hypertension, hypokalemia and periodic paralysis is seen in primary aldosteronism.
2, renal disease: such as congenital or acquired defects in the kidney, decreased response to antidiuretic hormone, reduced water reabsorption, the so-called renal uremia; or due to certain drugs, chemicals, heavy metals damage to the renal tubules to reduce the concentration function of polyuria, also seen in chronic pyelonephritis, chronic interstitial nephritis, renal tubular acidosis and acute renal failure of polyuria, chronic renal failure in the early stage.
3, mental factors: mental polydipsia patients often feel thirsty and drink a lot of water caused by polyuria.