Frequent urination but low urination may be due to: 1, cystitis, can cause bladder mucosal edema sensitivity increases, will lead to a small amount of urine stored in the bladder can produce a strong will to urinate, there will be frequent urination, urination, accompanied by obvious urinary incontinence, need to further urine routine, urine culture laboratory tests to clarify the presence or absence of infection. 2, bladder urethral calculi, and so on, can be obvious urinary tract irritation, can be manifested as frequent urination, low urine volume or pain in the lower back and abdomen. 3, cold weather can occur in the effective capacity of the bladder is reduced, there will be symptoms of frequent urination, low urine volume or pain in the lower back and abdomen. Urinary tract irritation can be manifested as frequent urination, low urine output or pain in the lower back and abdomen, and ultrasound is needed to clarify the situation.3. Reduced effective capacity of the bladder can be seen in cold weather, which may result in increased frequency of urination and low urine output, usually without pain or back pain.4. Surgery of the bladder may result in a reduction of the effective capacity of the bladder, for example, after a partial cystectomy. After surgery, the effective capacity of the bladder is reduced, and the phenomenon of reduced urine storage and less frequent urination can occur.