I had surgery for a slipped capitol femoral epiphysis on my right hip at age 11. The pain before the surgery (usually in the right but sometimes in both hips) was absolutely excruciating and left me unable to walk. I have always sometimes felt pain in my hips since, but not as bad. For the past few years however the pain has been much worse, sometimes again leaving my unable to walk on a certain leg. Since it is now affecting both hips almost evenly, I'm wondering if the problem is becoming more widespread? Sometimes it will feel as though my leg locks in place and walking becomes unbearable. The only way it goes away temporarily is if I stretch my leg behind me, which causes my hips to crack . After I can usually walk again for the next hour or so, sometimes longer. About 4 years ago I saw an orthopedist who told me my right hip x ray looked good, and to take glucosamine and wear orthodics. This worked to an extent but it was always present. Sometimes it feels as though it is bone on bone, and sometimes the pain extends into my knees. What can I do to get rid of this? Whats causing my hips to crack?!