Ok, so I just was wondering if someone could shed some light.  My right leg femur bone, directly in the middle cracks often is painful.  I have had no injury to it, but have had it for awhile and seems to be getting worse.  It directly half way down and it cracks a lot and when it does it is very painful.  Also sometimes in the same spot it will happen and my leg with almost freeze up and I have to limp on it for awhile to work it out.  It doesn't seem to spasm or anything along those lines.  I can feel it right in the bone. After it happens it will ache for awhile and then subsides. The weird thing is it is not in a joint area, so it confuses me. There are no lumps in that area but when it is sore to touch. I have a apt set up but was wondering if anybody has any ideas what this could be? since I can't find anything similar about it.