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.
You may see or feel a lump, bulge or swelling under the skin. It may be a bit uncomfortable. The swelling will often disappear completely when you lie down, as the contents of the hernia sac slip back through the hole into the abdomen. It may also be aggravated by coughing, sneezing, etc.