 [ Symptoms ] can shingles rash not have blisters my boyfriend has had shingles before but this rash he has is very large from his groin to all the way down his inner thigh on one side it is red and blotchy on the outside of the rash but the red blotches on the inside are very light no blisters and apparently has had this rash for over 6 months [ Disease ] if you have been on blood pressure medication for two years and the cold feet are a new symptom then it is unlikely your medication is the cause however any new symptom is a good reason to visit your health care provider and get checked out low blood pressure can cause cold hands and feet but it is relatively uncommon more often cold feet are caused by poor circulation this in turn can be caused by many other things such as diabetes peripheral vascular disease or even raynaud is phenomenon your best bet is to see your health care provider to discover what is causing your cold feet after a physical exam your provider might order a few more tests to get to the bottom of this    and help get your feet warm again