Is there any way to remove 20 year old scars?

Improve not remove: Genrally speaking old scars can be improved but not necessarily removed using a variety of approaches, some non-surgical and others surgical. The choice will depend on you in consultation with a physician and may require multiple sessions over a prolonged period. Meet with a plastic surgeon to discuss those options.

No: Scars cannot be removed, but they can be revised. You should see a plastic surgeon if it bothers you.