Hello, I am 6 3 about 210 lbs I have had a pulsating sensation or twitch under my left ribs . It comes and it goes . Today more frequent and in longer duration than other times . It causes no pain but I have felt that I m the last hear I ve had like a twitch in my shoulder for some weeks them in another part of my body like my elbow for a few weeks . I figure it s due to stress but now I worry that it may be something worse .