Hello, for the last few weeks random parts of my body [wrist, leg, knees, hand, butt] start swelling, they turn red, a little itchy and when i touch them they feel really hot, if i apply little pressure they start hurting like a bruise until i stop pressuring. After about 12-15 hours they pass and only pain remains for a few more hours, then it passes and goes to another part of the body. Right before they start swelling, i can feel something, if i pressure it i feel the same pain and i know soon it will be swollen and red. Ive never had any allergic reactions to anything before, i havent changed my lifestyle and i havent consumed anything that could potentially cause allergies to me. I dont have breathing problems or swollen throat or anything of the sort, just external red hot swollen areas. Its freaking me out as i read around the net and nothing really seems to match my symptoms. Any insight or information would be much appreciated!