Sounds brutal to me. My wife has RSD but is not young so I'm not sure how PT treats the very young with this condition. Ice is not a good idea what so ever.
My wife and I also live in Nova. We live in Fairfax which some would think would be a mecca of RSD treating doctors. After 10 years dealing with a loved one with RSD, the DC area has been the opposite as far as I'm concerned. I'm curious to know who is treating your child. I may be familiar with the doctors or facility. I could also recommend a couple places that may help. But sad to say it seems the best who treat this disease are not in the DC area.