I have been cycling a lot in the past year and a half. I have been riding about 3-5 hrs daily, and the majority of my riding has been climbing mountains. often, by the end of the day, my knees feel worn out. if they begin to hurt, ill give myself a couple days rest. Last weekend i cycled about 150 miles and although i didn't experience any pain during the ride, when i woke up the next day, my right knee had throbbing pain. Also above the knee cap, there is an unusual discolored oval spot about 3 inches long and about an inch wide. I'm scheduling time to visit an orthopedist, but i'm curious if anybody has had this happen to them. I had a physical exam about a month ago, and my doctor said i may have PFPS. I dont really want to stop cycling for a few months unless i have to, but i don't want to do irreparable damage to my knee. I'd appreciate some advice from experienced cyclists, Stretches, rehabilitation techniques, supplement recommendations etc. thanks