A few years ago, I had an issue which was quite mindboggling and couldn't get us an answer from any of my doctors as to what it was exactly. I was experiencing a redness across most of my upper body and I had a high fever (105+). I had no other symptoms, no pain, no itchiness, swelling, or anything else. Eventually we went to the ER and my feet started to hurt so bad they had to give me morphine only to dull the pain. After 4 days in the ER, it went away without treatment. What was it?