In daily life there is often a passive or active holding of urine. Normally, as long as the holding of urine is not too long, there will be no uncomfortable symptoms after urination, but if the holding of urine for a long time and sudden urination will lead to pain in the bladder area, and in serious cases there will be bleeding from the bladder, causing hematuria. There are more causes of pain in the bladder area after holding urine. If the pain occurs during holding urine, most of it is bladder distention caused by overfilling of the bladder resulting in an enlarged bladder, which will be relieved after urination. If the pain occurs even after the bladder has been emptied after holding urine, it is mostly due to a sudden drop in pressure in the bladder caused by holding urine for a longer period of time, and in this case it can even lead to bladder bleeding and cause hematuria. In addition, certain people who have the habit of holding urine for a long time are prone to bladder inflammation due to prolonged urine holding, which causes pain in the bladder area. There are also some more specific diseases, such as interstitial cystitis, in which the condition itself is difficult to hold urine, and if you try to hold urine you will experience significant pain. In summary, there are more causes of bladder pain after holding urine, commonly caused by overfilling of the bladder, or by a sudden change in pressure within the bladder, as well as by bladder inflammation.