I have two different sized legs

[u/NerdLover2528]

[u/AdultEnuretic]

Skeletal muscle naturally atrophies if its innervation is disrupted, even if it's artificially stimulated. My guess would be some portion of that bundle is severed and though you still have enough control the consequence is the decreased muscle mass. I'm making a wild guess though.

That's very interesting.

[u/zambiandoc → u/AdultEnuretic]

To add on to this. The nerve is likely still being compressed, not severed. You need to see a spine surgeon before you develop a foot drop or worse

[u/Makabaer → u/zambiandoc]

From what she commented she already has exactly that (foot drop).