I have had left sided hip pain for 10 months, it was painful when sitting and then standing again, it was also painful in bed when lying on that side. I was running about 25 miles a week at the onset but this was not an increase or change in pattern, no trauma had occurred, the pain just began when out on a normal easy run it gradually got worse whenever I tried running so I stopped. I saw an NHS physio which made no difference, they cannot dedicate the time and resources to this type of chronic injury. I went to a sports injury clinic where they diagnosed ITB syndrome, there I had intense physio, acupuncture, deep massage and interferential treatment. I do a full stretching and exercise session most days to build core strength and ease any tension. All this helped to relieve the worst discomfort and ease all the surrounding muscle tension but did not enable me to run. I have had an MRI which was normal, the sports doc tried a cortisol injection that didn't help. BUT finally I saw the chiropracter who said that my hips were out of alignment and my lower spine had one immobile area, who knows what caused it, however after the first session I could feel things were noticeably better and after a couple more I tried a 1 mile run - no pain!! I slowly built up to 6 miles, bliss I was running again. Unfortunately as warned things started to slip back so after another session with the chiro I have to keep the mileage down but the good news is that I know I can continue to be a runner but I won't be racing for a while yet! There is hope - just try everything, eventually some or all of it helps.