Good evening @vicki1234, Welcome to Connect, I have read your post and am a bit confused. I would like to be able to introduce you to others who have encountered a similar situation. We are going to need a bit more information from you. Here are some of my pondering thoughts.

When did you have the first surgery on your right knee? How long was it before the second surgery? You mention a build-up of scar tissue. Has that just happened?

What kind of physical therapy did you undergo after the first surgery? By chance, have you tried MFR, myofascial release therapy for scar tissue?

You indicate that your doctor may not even know about replacing plastic pads. Pardon my lack of understanding, but how could he/she not know if you are considering another surgery?

And finally, how would you like us to help you?

May you be free of suffering and the causes of suffering.
Chris

@vicki1234 Welcome to Mayo Clinic Connect, a place to give and get support.

I'm sorry to hear that you've had so many issues with your knee replacements.

You'll notice that I moved your question to a previous discussion related to this topic. I did this so you could connect with members like @msstoppainnagginme @wa34937 @rsroseco who may be able to support you.

May I ask what you mean by, "Not sure if my doctor know?"

First knee operation on January 2019. 2nd knee operation on August 14, 2020. Scar tissue developed a short time later—or that’s what they say it is? Third operation scheduled May 4th of 2021.