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Introduction A novel type of a disposable circumcision suture device (DCSD) has been proved to be effective and safe; however, a few cases of severe bleeding took place after circumcisions. Aim To evaluate the effectiveness of a modified double-layer pressure dressing to avoid severe bleeding after circumcision with the DCSD, in our department in a prospective randomized controlled study, and discuss the mechanism of bleeding with DCSD. Methods Patients with redundant foreskin or phimosis were included between September 2018 and November 2019 and divided into 2 groups: In group A, the conventional pressure dressing was performed; in group B, an modified double-layer pressure dressing was performed. Main Outcome Measure The main outcomes and complications (surgical time, incidence of glans ischemia, severe bleeding rate, infection rate, pain level, total cost, and overall satisfaction) were collected and analyzed. Results A total of 624 patients were recruited for this study. There was no difference in the average age and body mass index between 2 groups. No patient suffered obvious glans ischemia. In group B, lower pain level, lower incidences of severe bleeding, and better satisfaction were recorded. Conclusion The mechanism of bleeding with the DCSD was discussed in this study, and the modified pressure dressing was proved effective, safe, and easy to perform.