Painful urination after urethral catheter removal is mainly caused by the following reasons: First, it may be due to the process of urethral catheter insertion, which can lead to damage to the urethral mucosa of the patient. During the period of indwelling urethra, the urethra mucosa will be rubbed with the urethra mucosa when the patient moves, which will lead to some damage to the urethra mucosa, and after the urethra is removed, the damage has not been completely repaired, which may lead to pain when the patient urinates, and this pain may be gradually relieved after 2-3 days. Second, some patients are prone to urinary tract infections when the urethra is inserted, especially pathogenic microorganisms such as bacteria, which can easily invade the patient’s urinary system, leading to urinary system infections, such as cystitis and urethritis, which can cause painful urination in patients. Therefore, it is relatively common for patients to experience painful urination after having a urinary catheter removed. If the painful urination occurs for a long period of time, it may require active treatment to get better.