I have to say how disappointing the qualityof this webisite is. There is no reference to peer reviewed trials despite the quoting of some study. This claim about harm is an important claim to back with sound evidence. The MD advocating the ceasing of such treatment made these claims over 10 years ago And proposes some fanciful theory about needint tp warm up the affected area.
Please note I am not suggesting such a treatment as hot/cold therapy should be practiced. Onthe contrary, there is no evidence for this treatment works and clinically it can cause un necessary exacerbation of pain and distress. But to claim that it will advance RSD needs some decent evidence of harm and not just anecdote and threats of law suits.