The male urethra is usually around 5-7mm in diameter. The male urethra is usually thin and long, the length of the urethra in adult males can be between 15 and 22cm, while the diameter of the urethra is usually around 5-7mm. In men, there are usually three physiologic strictures of the urethra, and the diameter of the urethra at these strictures is usually under 7mm. The patient’s own congenital dysplasia of the urethra as well as the occurrence of some urethral inflammation later in life can lead to the proliferation of their own urethral epithelium. As well as some traumatic injuries lead to fibrous repair of the urethra, which can cause urethral stenosis. If symptoms related to the urinary tract, you need to consult a doctor in a timely manner, under the guidance of a professional physician to find the cause of the disease, standardized treatment.