i have a twitching in my upper left outer thigh,& the twitching matches my pulse, but i cant tell if its a muscle twitch or a cirrculation restriction. i dont mean to sound like a proffesional healhcare provider, im a mechanic, but when systems aren't running normally i get concerned. im not a hypocondriact (sp),& i've never asked for healthcare advise online before,but i'm getting older now (48 wht male)& i've never had my midlife physical. There's no pain involved,& im otherwise fine,but this twitching just started a week ago, & it came on instantly & suddenly. Could it maybe be a blockage? (non smoker, beer drinker)