The presence of both, keyhole scars, that are usually 3 or 4 tiny incisions (sometimes even fewer), only around 1 in each, and bigger scar, may indicate that your surgeon probably have decide to convert the keyhole surgery to an open procedure during the intervention.
Sometimes it is not possible for the surgeon to use the laparoscopic technique because it may be difficult to see or handle tissue safely.
Factors that might increase the possibility of changing to an "open" procedure are obesity, previous abdominal surgery causing dense scar tissue, inability to see organs or bleeding during surgery.
Usually, it takes up to 2 weeks for incision to heal completely.
Only infected surgical wound can open up, known as wound dehiscence.