Hernias occur when there is a weak area or even a hole in the fascia or tissue surrounding the muscle. This allows the abdominal contents to move through the fascia and a sack is created.
When an abdominoplasty or tummy tuck is performed, routinely the midline fascia is repaired which can prevent ventral hernias from occurring. If other defects are noticed they are usually repaired. So not only do tummy tucks not cause hernias but they can prevent them as well.