Inguinal hernia is a specific post-operative complication of radical prostatectomy, but so far it has not been reported in Denmark. In this review, we report the incidence of inguinal hernia after both open retropubic and robot-assisted approaches and discuss potential disease mechanisms. Different surgical techniques to prevent development of inguinal hernia after radical prostatectomy have been proposed. Increased attention to patients with a high risk of developing inguinal hernia after radical prostatectomy and concurrent inguinal hernia repair could be a possibility.