When I work out the scar on my stomach from sergury feels like its going to rip open?

So im 17 yr old Male. When I was an infant I had sergury which left me with a scar right below my belly button, The scar is indented into the skin if that makes sence. When I do sit ups or any form of ab workout the scar feels extremly tight and feels as if its going to rip open and second. Its a good size, probably around 6 inches long right below my belly button in a smile shape. I dont know whats wrong its annoying because thats all I feel when i try to workout and i want a 6 pack. Even if I'm not working out and I just tighten my stomach I can feel the solid like tention that It's about to rip open.