Women are advised to go to the hospital for examination if they experience a decrease in the frequency of urination, especially over a long period of time. Under normal circumstances, the frequency of urination is about 8 times a day, of which the frequency at night is about 0-1 times. If it is significantly less than this frequency and reduced for a long time, the possible reasons: 1. Abnormalities in kidney function. For example, a variety of chronic renal failure, nephrotic syndrome, etc., can lead to a decline in renal filtration capacity, so that water can not be effectively filtered, so the volume of urine is reduced, the frequency of urination is reduced. At this time, the patient will often be accompanied by obvious edema performance, manifested as facial or limb edema, it is recommended to go to the hospital for renal function laboratory tests to clarify. 2, bladder prolapse. If a woman has bladder prolapse, it can cause an increase in the residual urine in the bladder, which will result in a decrease in the frequency of urination, especially in more serious patients, there can be urinary retention. The patient may urinate very infrequently throughout the day, and all the urine is stored in the bladder and cannot be excreted smoothly.