If the cause of your new pain is from overuse or RSD, my question is why risk it? My thought process here is, I to was told that my other ankle and foot were hurting from overuse. (not my rsd foot) but now my toes turn bright red, burn, hot, cold and hurt. The nails are yellow/tan in both feet now, so I disagree with the fact of overuse, I believe my overuse turned into spread.
Dr.;s also say use heat after 3 days of an injury not ice anyway. So in my opinion it is not well adviced to use ice on anything.