Sciatica or Piriformis?

I have had a recurring issue with extreme pain involving my sciatic nerve. For several years I just went to the chiro to get adjusted. It worked well, but every time I would go on a run the pain would return within a half a day.

So, after some googling, I found out the piriformis muscle is more of my problem, than say, lower back. It turns out that when the piriformis muscle swells or spasms from an activity like running it puts pressure on the sciatic nerve, causing the pain. So, I have now incorporated some new stretches just for the piriformis muscle and it helps tremendously.

This morning was 20-25 minutes os some core work on the ball and 45 minutes of yoga at lunch.