Interesting finding these comments as I have the same hamstring problem and asked about it through my medical doctor and it was brushed off. Well thanks to these groups I am finding that other people have the same symptoms or problems that I am having. Most of the time my right buttock area has this pulling or pain. I have a mild case of CP and have also recently been diagnosed with Camptocormia and figured it was related to that. Makes sense that since my right side is stronger than my left that being different lengths cause the pain when moving. Really starting to enjoy these group discussions. Maybe I will get my medical degree one day so that I can "help" my doctors understand that I am not the only one with my problems.