I don't know about reynauds disease (other than that it's sometimes associated with or confused for CRPS), but for CRPS its definitely a 'use it or lose it' approach... Keep walking as much as you are able to without making your pain too bad - a small increase in pain is understandable, but a big jump is bad news. It's that old chestnut of 'pacing'.

Just had to get mine elevated with socks off Bright red and hot. You could fry an egg or two on the darn things. Oh well.

Bram.