Ever since I started the longer runs (40 mins plus) I have had an odd , not really a pain, but a tightness or numbness in my one side of my bottom, and down one leg. These last couple of weeks the sensation has spread down one leg and across my foot. Always on the same side, and all the time now, not just after running. After Pilates last night i mentioned it to my instructor. When i told her the pain went all the way to my big toe she pulled a face and said "Not good! Don't run! Chiropractor!". I'm making an appointment ASAP, but i wondered if anyone had suffered anything similar? I'm worried that's it for my running!