Hello. I Have Had A Red Bumpy Itchy Rash For

hello. I have had a red bumpy itchy rash for 6 days now, it started on areas of my feet around my ankles mainly with some areas where my sandal straps touched my skin. The same day, my right elbow became swollen and also displayed the same red bumpy itchy rash almost like hives, but it did not go away. By the following day, both elbows were swollen and covered with this rash as well as both feet. I tried my best not to itch, however when I couldn't stand it, and did barely itch my elbow, it instantly became hot and very inflamed looking, this rash gets much worse with body heat.