There are physiologic causes of oliguria, as well as pathologic causes, which can be treated with general therapy, drugs and surgery. 1. Physiological low urine When the weather is hot, water evaporation and less hydration, then it will cause less urine, at this time should be appropriate to drink more water, produce water diuresis, urine will increase, when the patient can’t drink water, can be intravenous rehydration. 2.Pathologic oliguria (1) Kidney stones, ureteral stones or tumors: stones and tumors produce obstruction and compression of the urethra, thus causing urine can not be discharged, and in severe cases, it will lead to hydronephrosis. After indwelling catheterization, extracorporeal shockwave lithotripsy can be used to deal with the stones or surgical resection of tumors to restore the urine output. (2) Certain renal diseases: such as acute glomerulonephritis and other diseases, can also cause oliguria, at this time should be given intensive treatment (plasma exchange, methylprednisolone shock accompanied by cyclophosphamide treatment), the condition is serious using alternative treatment, there are hemodialysis, peritoneal dialysis and so on. When there is a decrease in urine output, and drinking more water is ineffective, you should go to the hospital in time for early treatment.