Is It Possible to Reduce or Remove Muscle in the Left Buttock?

I bought an exercise machine 10 years ago and put more pressure on my left leg. This greatly increased the muscle size in my left buttock. I then put more pressure on my right leg, but the muscle size in the right buttock did not increase. Both buttock cheeks are now completely asymmetrical.I have had Liposuction which has made an improvement visually, but the muscle is excrutiatingly painful when sitting and even after hoovering. I have been looking into fat grafting. Can I reduce/remove the muscle in my left buttock? My GP won't help. Please help!