Hi your father has had INCISIONAL HERNIA
and that means Hernia(Bulging) at the SITE of Operation which can occur due to various reasons.Hernia has SURGERY as the ONLY OPTION for cure however NOT all hernias
need surgery.Large hernias need to be operated either open surgery or by Laparoscopic surgery
. Depending upon the status of the muscle at the operating site one may or may not need to put a MESH to strengthen the wall and secure the sutures so that the recurrances can be avoided or reduced.If surgery is imminent,it is better to do the hernia repair
before it keeps progressing to a size that becomes unmanageable or difficult to manage so do get back to your doctor or GI specialist or Lap Surgeon and get the right choice implemented .