Drinking water but still urinating less? Beware of these reasons!

Urine is a normal product of the body's metabolism. From a health perspective, the daily urine output of the human body should not be less than 400 ml. However, some people still urinate less even if they drink water every day. What is the reason?

A sharp drop in renal blood flow

Certain reasons cause a sharp decrease in renal blood flow, resulting in severe renal hypoperfusion or renal disease affecting the glomerular filtration function and lower urinary tract obstruction, which can lead to oliguria and anuria. Clinically, the three links are often causally related to each other, and oliguria can occur as long as one of the three links exists.

Prerenal oliguria

Prerenal oliguria is caused by insufficient renal perfusion and a sharp decrease in glomerular filtration rate due to various reasons, including hypovolemia, shock, decreased cardiac output, hepatorenal syndrome, etc.

Renal oliguria

Renal oliguria is caused by renal parenchymal damage, whether it is primary glomerulonephritis or secondary to systemic lupus erythematosus, polyarteritis nodosa, infective endocarditis, dermatomyositis, etc. Late stage of chronic renal failure and oliguria and anuria of acute renal failure show oliguria. Renal interstitial disease: the most common drug allergy such as penicillin, sulfonamide drugs, rifampicin, aminoglycoside antibiotics, etc. cause renal interstitial damage. Heavy metal poisoning, etc. Reduced blood supply to the kidney causes oliguria and anuria.

Postrenal oliguria

Postrenal oliguria is common in urinary tract obstruction such as stones, tumors, prostatic hypertrophy or prostate cancer, diabetic neurogenic bladder, etc.