I get that on my knees and it's the strangest thing. It looks as if I fell and skid on my knees! There is something that I eat that causes it, and I haven't figured out what it is yet. At one point I was eating cocoa butter and when I stopped it went away, but I had it again in June but I wasn't eating cocoa butter then. I'm on my short list of food right now, so maybe if I feel brave I will start adding stuff back in and see if I can figure it out.
This time of year is always the hardest for me as far as being able to eat food. By November food starts to bother me less, December is great, and January it starts to go downhill again. Strange.