Maybe here we go for the link between it:"In 1998, a study was done concerning the link between panic disorder with joint hypermobility. The prevalence of panic disorder among patients with joint hypermobility syndrome was 67.7% compared to the control psychiatric group (10.1%). Women and subjects who were younger were found to be over 20 times more likely to have the hypermobile joints than their counterparts in the control group. "And there sure enough is a link between anxiety and BFS.I just had a look at their forum and what do they do? They are double jointed and..have pain, felt stiffness, numness, needles and pins, twitch, anxiety, tremor and jerk.......for some, it justs seems to go hand in hand. But in fact, it doesn't make a difference it it's both or if HMS led to BFS , there's no other treatment than anxiety control and sometimes pain reliefers. Tegretol got my twitching almost down to zero, but hasn't done anything for the restexcept my tremors. I'm not too sure if I will keep taking it.