Patients with urethral strictures can cause urinary fluid retention, leading to obstructive disease. However, when the patient undergoes ultrasound, only morphological changes caused by urethral stricture can be detected, including complications of fluid retention and obstruction, but not the diagnosis of urethral stricture. If a urethral stricture is detected, a urography should be performed, in which X-rays can reveal the exact location of the stricture, including its length and severity. If the urethral stricture is mild, the patient can undergo periodic urethral dilatation and then wait for the mucous membrane to grow, potentially returning to normal. If the stricture is long and causes serious complications, the patient will need a urethral mucosal graft to prevent the stricture from progressing further or causing more serious complications.