I have the same problem.I have been on an eternal quest in life to figure out what causes that God awful,deep in the bone ache.Sciatica,explains the sharp stabbing,shooting pains;but I've never been able to get anything but a strange look,when I try and explain the, bring you to your knees,lose all your strength in your legs,deep bone ache.So if you can ever get an answer to that question,please let me know also.I must have asked at least 20 Dr.s that one,and I've never recieved anything but a confused look.