Possible causes of frequent urination at night in women: 1, acute or chronic infection of the urinary tract can appear frequent urination, it is recommended to go to the hospital for further examination of urine, if there is infection, then anti-infection treatment is needed, then frequent urination can be improved. 2, postmenopausal women have atrophy of the urethra and bladder epithelium, the ability to resist decreases, and there is relaxation of the pelvic floor muscles, and cause the bladder and urethra to move down, this can appear bladder emptying This can lead to impaired bladder emptying and increased residual urine in the bladder, which requires residual urine measurement. If the residual urine is greater than 50ml or more, oral medication is needed to improve the residual urine, and the number of frequent urination can be reduced after the residual urine is reduced. 3. Patients with heart or liver disease may have edema, such as patients with poor heart function can have lower limb edema, and when lying down at night, the edematous body fluid flows through the heart with the blood, resulting in increased blood flow to the kidneys, when the filtration capacity of the kidneys is enhanced, which can also produce Nocturnal urinary frequency. Patients with liver disease when lying flat at night increase the amount of blood returning to the heart, which can cause enhanced filtration and can also produce frequent nocturnal rising.