Does anyone experience a weird burning sensation that feels like it was right under the skin? It's not really painful, but very unpleasant. It's mostly located in my feet and hands, but also in my legs. Normally it occurs in the morning, when I wake up. The feeling isn't like being sunburned, probably a bit like hot and cold and not sensitive to the touch. I heard that some cfs patients suffer from an "acid poured over the body" feeling, and I guess it somehow feels like that, but as I said, not really painful. Also my legs feel a bit more heavy then. What could it be?