1. Urinary tract infections, such as urethritis and cystitis, can cause pain when urinating, which is the most common symptom and the most obvious symptom of inflammation. The most obvious symptoms are painful urination or increased urethral discharge, resulting in blood dripping from the urethra, which requires further urethroscopy to rule out the presence of these lesions. 3. This can appear painful urination, or in the state of sedentary, holding urine, mucosal hyperemia can also cause local pain and discomfort, this situation patients have a long time to hold urine or have local injuries, etc..