My toes will often turn a blue colour, swell and turn painful to touch. After a day or two water blisters often develop and by a week to a fortnight all symptoms are gone until the next episode. It can happen summer or winter although my feet are always cold anytime of the day or season compare to the reSt of my body. I have tried thermal socks bed socks and all items of such but I still have bouts of these symptoms occurring. What do you think it could be?