my wife had laparoscopic cholecystectomy just over a week ago. She is feeling fine, other than tenderness around surgery entry sites. However, the umbilical site has a firm spot directly below the cut. There is no redness, swelling or fever just the hard area under the cut. When she pushes on it it does not move, just a hard spot. She has a follow up with her surgeon in a few days, what could this firm spot be?