When mine spread it just crawled up my leg with no discoloration or swelling. But the pain, burning, stinging, etc. was the same. The calf did get thinner than the other leg, and have the temp change, so we had some clinical change. The whole leg became super sensitive to any pressure, certain fabrics (no jeans...) and my lower leg can't handle flapping pants.
My right foot is the affected foot and my left foot randomly got the CRPS rash. But is otherwise fine. That was weird.