If female patients always feel the need to urinate, but the volume of urine is not much, then the possible causes: 1. Chronic urinary tract infection, such as chronic cystitis, chronic urethritis, etc. Chronic bladder mucosal epithelial congestion and edema due to incomplete healing of inflammation, when bladder sensitivity is increased and effective volume is relatively reduced, patients always feel the urge to urinate and do not urinate much each time. When a certain amount of urine is stored, discomfort in the small abdomen or discomfort in the urethra may occur, and the bladder may still feel unfilled after emptying. It is recommended to check the urine blood test to rule out whether you have a chronic urinary tract infection. If there is an infection, anti-infection treatment is recommended. 2. The presence of urinary stones or urinary tumors, such as bladder stones, lower ureteral stones or bladder sidewall tumors. Stones and tumors are chronic irritants that always stimulate the bladder to keep contracting while producing a certain amount of urination. However, the volume of urine is not much every time you urinate, so it is recommended to perform a urinary ultrasound to rule out any related diseases. 3. Overactive bladder or interstitial cystitis. In overactive bladder disease, there is no infection, because the bladder is overly sensitive and there are frequent and continuous contractions, the patient has more frequent urination and still feels unvacated after urination, but there are no symptoms of pain during urination, and there are no symptoms of infection in routine urine examination. Interstitial cystitis can be caused by chronic urinary tract infections that result in the absence of the aminoglycan layer in the bladder. In this case, urine irritates the bladder mucosa and can produce pain in the suprapubic area, which is especially noticeable when holding urine, but the volume of urine is not large each time, and the urine still feels incomplete after urination, which requires further cystoscopy and urethroscopy to confirm the diagnosis.