Hi, thank you for the question. Here is the response from Dr. Hartigan:

"Lower buttock pain can be a variety of issues. Tight piriformis, SI joint problems, sciatic nerve entrapment, ischiofemoral impingement, trochanteric bursitis, Lumbar radiculopathy, femoroacetabular impingement in the back as opposed to the front which is more common, and the list goes on. This is a very complicated specialty, please contact us at 480-301-8484."