Holding back urine is definitely not good, if the capacity of the bladder reaches a certain level, there will be a desire to urinate, and it will be urinated. If the bladder has a lot of capacity, but still did not urinate, the bladder will be overstretched, which will lead to low contraction force of the bladder forcing muscle, and for a long time will lead to weak bladder contraction force, and even lead to the occurrence of urinary retention, and the long-term holding back of urine may also lead to the emergence of urinary tract infections. It is recommended that the usual urinary output should be more than 200mL each time, and the number of times of urination in a day should be 5-6 times, so that the urine can be discharged effectively. Bladder capacity reaches a certain level without discharge, but also lead to secondary hydronephrosis of the kidney ureteral dilatation, can also induce upper urinary tract infection, it is recommended that should be regular urination, regular urination.