Itchy, red swelling in feet and legs?

It's happened for months now where I have really red, painful, swollen, and itchy hands and feet. I've been told that this is from my blood not circulating right and I get that but one thing is that whenever I go to the gym and I lift weights and run for a long period of time, my hands for one get almost completely purple along the lines of my vains and my feet get swollen a couple hours later. I have gained a significant amount of weight and I know that when someone gains weight quick, it puts a lot more weight on your feet causing them to swell but the thing is I get them on my hands as well and sometimes it even looks like I get internal blisters and hours later they go down. I also get external blisters that are very itchy, swollen, and carry water inside but the weird thing is, the internal ones come and go every few hours. I thought I was allergic to my high blood pressure medication but I stopped taking it and it hasn't seemed to help at all. Now, I just ran out of insurance so it's not really an option at the moment so I was wondering if anyone else has had this problem?