An Incisional Hernia is a hernia that occurs through a previously made incision in the abdominal wall, ie the scar left from a previous surgical operation.The incision will have been made in order to get to an internal organ such as the appendix, or a caesarian section.
So an Incisional hernia is not the same as a Recurrent Hernia.
Remarkably common, really. It is estimated that at least 12-15% of abdominal operations lead to an incisional hernia.Historically, and even today, the success rate for repairing them is quite poor with a high incidence of complications and failure. In some reports from other surgeons 50-60% of incisional repairs have failed within 2 years.