In general, the normal adult bladder capacity is between 350 ml and 500 ml. The exact bladder capacity varies from person to person, and is related to factors such as gender and age. Women’s bladder capacity is generally smaller, and older people’s bladder capacity will be even smaller, related to the older people’s bladder wall fibrosis, bladder contraction force is weakened . Of course, the bladder is able to store about 1,000 ml of urine if it is not urinated on promptly. However, if an adult does not urinate for a prolonged period of time, the resulting increase in bladder urine volume can cause increased tension in the bladder wall, resulting in painful symptoms. The bladder is very elastic, so the amount of urine stored in a holding situation is much greater than that stored under normal conditions, but holding urine for a long period of time when it is not necessary can damage the body. Therefore, you should urinate when you feel the urge to urinate to avoid damage to your bladder from holding urine for a long period of time.