I HAVE DEVELOPED RED BLOTCHY SKIN ON MY FEET AND JUST ABOVE MY ANKLES. i SIT AT A DESK ALL DAY. i ALSO RECENTLY TOOK A COURSE OF COLD FX AND THE BLOTCHINESS APPEARED A FEW DAYS LATER. DO YOU THINK IT IS AN ALLERGIC REACTION AND IF SO HOW LONG SHOULD IT LAST OR DO YOU THINK IT IS A CIRCULATORY PROBLEM?