Hypertrophy of the intervesical ridge is one of the clinical manifestations of bladder neck contracture. Bladder neck contracture is an important bladder neck obstruction problem. The bladder neck is defined as a tubular section of the urethra extending 1 to 2 cm in length from the internal urethral orifice into the urethra. It includes the internal sphincter, but the internal sphincter is not the entirety of the bladder neck. Contracture of the bladder neck can be congenital or acquired. Congenital cases often have no clear cause other than typical local pathological changes and are more common in men; acquired cases are often due to local chronic inflammatory conditions such as posterior urethritis, prostatitis, and deltoiditis, and the incidence is not lower in women than in men. Congenital cases are mostly seen in children, often with urinary disorders before the age of six, but it is not uncommon for them to develop after the age of 20 or 30. Pathological manifestations include replacement of the submucosal smooth muscle of the neck with fibrous connective tissue, pale, rigid and fixed bladder neck, and narrowing of the neck opening. The manifestation of bladder neck obstruction, i.e. prolonged difficulty in urination, appears. In women, also known as female prostate disease, it is more common in middle-aged and older women. Bladder neck contracture in men can occur at the same time as prostatic hyperplasia. Therefore, the bladder neck should also be formed after prostate removal, otherwise the obstructive symptoms cannot be relieved. The following are the common causes of inter-ureteral ridge hypertrophy: 1. Prostatic hyperplasia Prostatic hyperplasia (BPH) is one of the common diseases in middle-aged and elderly men, and its onset is increasing with the aging of the global population. The incidence of prostatic hyperplasia increases with age, but there are not always clinical symptoms when there are hyperplastic lesions. The incidence is higher in urban than in rural areas, and ethnic differences also influence the degree of hyperplasia. The pathogenesis of prostatic hyperplasia has been studied extensively, but the cause has not yet been elucidated. It is now known that prostatic hyperplasia requires both a functioning testis and advancing age. The relationship between smoking, obesity and alcohol abuse, family history, ethnicity and geography on the occurrence of BPH has also been noted in recent years. 2, ureteritis Ureteritis is an inflammatory lesion of the ureteral wall caused by pathogenic bacteria such as Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa (Pseudomonas aeruginosa) and Staphylococcus. It is often secondary to infection, endogenous or exogenous injury in other parts of the urinary tract. The main manifestations are urinary frequency, urinary urgency and painful urination, accompanied by lumbago and back pain. In severe cases, symptoms such as hematuria and fever may occur. When severe hydronephrosis is caused, there is percussion pain in the kidney area.