For me it's diagnosed as muscle spasms- they are visisble and can't usually be felt from the outside, it's mostly in hip
and groin area, sometimes down thigh. I used to take skelaxin, and now i'm on flexiril, both worked. I also get it in my bowels (which was very hard to pinpoint because they area actually changes sometimes. I have IBS and endometriosis, so some people think that contributes. For the bowel problems I take amitriptyline and a great small bowel relaxer-hyoscycamine.