What is the difference between a adhesion and a keloid?

External: Keloid is external thickenig of skin. An adhesion is scar tissue inside form surgery.

Stable vs growing : An adhesion is a scar anywhere in the body (not just the skin) that physically causes two structures to become adherent and is a common cause for bowel obstruction. They remin stable in size over time. Keloids are scars that have a tendency to grow over time and more likely occur on the skin.