Always want to urinate before going to bed i.e. frequent urination, may be caused by drinking too much water, chronic cystitis, prostate disease and other factors, need to be analyzed specifically. 1. Drinking too much water: If you drink too much water before going to bed, in order to maintain the balance of body fluids, the kidneys will excrete more urine, and frequent urination before going to bed occurs. 2. Chronic cystitis: due to infectious pathogenic bacteria stimulate the mucosa of the bladder neck and triangle, resulting in mucosal edema and erosion, there will be urine stimulation of the neck and triangle before going to bed, resulting in frequent urination. 3. Prostate disease: If the patient has prostate hyperplasia or prostate tumor, the urethra becomes narrow, and the bladder can not be completely emptied every time he urinates, and frequent urination will occur. In addition, the symptom can also be seen in overactive bladder syndrome and diabetes. If patients experience frequent urination before going to bed, it is recommended that they seek medical attention to identify the specific cause and take targeted measures to intervene.