Objective: To check the contralateral patent processus vaginalis (CPPV) prevalence in life, and the significance for the treatment.Data sources: We performed a retrospective review of all inguinal hernia (IH) cases who underwent repair in our hospital from 2014 to 2018. Study design: We analyzed the occurrence and treatment regularity in boys. Checked and compered the history, initial sides of hernia, CPPV and prognoses in different age groups. Data collection: We checked all IH cases repaired in our hospital, picked out the male cases, including boys and men, recurrent cases were not enrolled.Principal findings: A total of 3243 cases were enrolled, 2489 (right-sided IH 1411 (56.69%) vs left-sided IH 975 (39.17%), bilateral IH 103 (4.14%)) in children, and 754 (right-sided IH 485 (64.32%) vs left-sided IH 236 (31.30%), bilateral IH 33 (4.38%)) in adults. 1124 CPPV were checked in children with unilateral inguinal hernia (2386), 12 in adults of 267 (p<0.0001). There were no significant differences in recurrence rate between the blocks in children (p>0.05).Conclusions: The incidence of inguinal hernia in boys was significantly higher than men. The number of cases declines rapidly with age in boys. Processus vaginalis obliterates and involutes, last for a long period, routine exploration on contralateral may kill the possible of self-obliterating capability.