In this photo I am relaxed and standing on one leg. I am not pushing or holding my knee down. I should have taken the picture without my hand resting on my knee, but I didn't. This position does not cause me any pain and it is not difficult for me.
This is the exact same position on the other side. On this side the position is mildly painful at rest. It hurts to push my knee down. I cannot push more than a couple inches. When I do it does not feel like a tendon or muscle stretch. It feels like I'm trying to make my leg move in a way that its not designed to move. Standing in this position for a minute made my leg tingle and start to go numb. Or maybe just because I tried pushing my knee down. Its hard to explain how it feels, but its not "stretching". It doesn't feel like any other stretches, including the same position on the other side.
Does this indicate a problem beyond asymmetrical muscle development and flexibility?
When I do the figure four stretch I definitely do have tight glutes on that side, which I've started working on. However, It doesn't feel like that alone could account for this level of asymmetry. Or is this amount of imbalance common?
What other muscles in the kinetic chain do you recommend I focus on and do you have any specific stretches to recommend?
A month ago I couldn't touch the floor. With regular stretching I can now touch and hold my palms to the floor, so I don't think its my hamstrings or calves. I also did a hip flexor test I found online and it was no problem for me, for whatever that's worth.
I have not found any other stretches where I'm notably asymmetrical. With that said, I don't really know what I'm doing, so don't assume I do.
Thanks in advance for your help!