Good info. Just had a serious disc herniation and been strugling with sciatica the last half year.
The pelvis accutally went down on the problem side. Making the leg longer on that side. I think its normalizing as the condition is improving, but I will pay attention to it. Never had one leg longer than the other before.
I found walking, and trying to not provoce more pain, and totally not sitting, as useful. Some streches might have helped, but honestly, the big improvements came when I didn't do so much actively to heal, and just walked as long as I could.