Why is there a desperate situation of “lifetime dilation” after surgical treatment of urethral stricture? Urethral injury leads to bleeding, mechanization and scar formation, which can obstruct the urethra and form urethral strictures. If the scar does not completely block the urethra, minimally invasive surgery can be performed through cold incision of the urethra with less damage. If the scar completely obstructs the urethra and the normal urethra is lost, urethral commissurotomy is often required. Regardless of the procedure, some time of postoperative urethral dilation is required. The reason for this is that first of all all surgical procedures are performed to remove the hyperplastic scar between the bladder neck opening and the distal urethral stricture and to establish continuity and patency of the normal urethral lumen. However, the normal anatomy between the bladder neck opening and the distal end of the urethral stricture is a spatial connection rather than a planar two-point connection, and the channel between the two points established by urethral rendezvous and urethral cold incision may have a slight error in spatial three dimensions with the normal urethra, requiring some postoperative correction, with the aim of making the repaired urethra as close as possible to the urethra in its normal anatomical position, so that it is close to normal voiding for 5 days after removal of the urethra or more. The excision of the scar site will inevitably lead to the formation of a new scar again, only to a different extent. Therefore, the urethra must be dilated periodically after surgery to dilate the newly formed scar to ensure urethral lumen patency. As the degree of scar proliferation decreases, the frequency of urethral dilation will gradually decrease and eventually stop altogether. However, it is very important that the urethra must be dilated immediately when the patient develops a thinner urinary line than previously, or has difficulty urinating. Otherwise, a large amount of hyperplastic scar tissue mostly requires increased frequency of urethral dilation and, if dilation into the bladder is not possible, surgery to establish the continuity and usual rows of the normal urethral lumen, i.e., a return to the initial origin position. This is the main reason why some patients fail to pay sufficient attention to “urethral injury and lifetime dilation”. Second, can’t urethral stricture dilate the urethra painlessly? The root of the pain of urethral stricture is not only that the procedure is tedious and requires a certain amount of time to dilate the urethra as required by the doctor, but also that it is too painful to dilate the urethra, the kind of pain that can bring tears to the eyes of a man of steel and be remembered for the rest of his life. Patients often say that “urethral stricture after urethral injury is the end of a happy life and the beginning of a tragic life”. There is no avoiding the disease, and dilating the urethra is a must.