I was in New Orleans for tHe Final Four and rode my bike alot while I was there. After a ride, I notciced a small cluster of white bumps on my left elbow They do not itch , but they are raised and get red sometimes. I also have a raised red patch on the inside of my knees and on the outside of one knee. And all of a sudden tonight, I noticed a circular patch on my right hand , but its only raised slight at the edge and slightly red. I m really worried about where thses are coming from.