if skin can regenerate and heal itself albeit slowly, why can’t stretch marks and scars go back to normal?

Question

if skin can regenerate and heal itself albeit slowly, why can’t stretch marks and scars go back to normal?

In: Biology

Answer 1

According to my A&P professor, the cells that repair and replace skin is not that far below the surface. A cut that is not deep enough will not leave a scar. However, if you cut down into that network you’ve destroyed the regeneration center for that spot. That being said, over time stretch marks and scars often soften, or fade somewhat.