For at least five years now, I've been having a recurring palmar rash that is followed by one red, inflammed, tender, hot DIP joint in the same hand (the finger varies). I've done some reading about psoriasis and psoriatic arthritis, but the "rash" doesn't resemble any pictures I've seen of psoriasis. It's comprised of flat, red, circular spots, no bigger than a pencil eraser, and it doesn't itch. Is this even considered a "rash"? Any thoughts? Also, my son has psoriasis over his elbows in the winter, and my daughter has eczema.