@blessangela2019 Once scar tissue forms I don't believe it will go away without some surgical intervention. I cannot say that I am 100% sure, I could be wrong. I was not familiar with astym so I just googled it. It sounds very encouraging. To increase my flex in the knee done in October 2017 this is what the surgeon's NP said:

An arthroscopic lysis of adhesions is what the procedure is called. The doctor goes in with a small camera and a small tool that burns the scar tissue away. He doesn't use the long incision. He makes two small 1/2 inch incisions to get his tools in the knee. It's same day surgery. You go home after the procedure. You walk, fully weight bearing right away. You start using the bike the day after surgery. Treadmill would wait several weeks until you have minimal swelling and get good motion on the bike. Once we see you at your first post-op appointment approx 10-14 days after surgery we see how your incision is healing and will let you know when you can get back in the pool.

Is your doctor proposing the astym procedure? If you have confidence in him I would go with what he advises. If you are not sure you should get a second opinion.
I have no idea which procedure is the best, but if your doctor tells you more about the astym, I would be interested in it, if you could share it.
JK