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When you apply this to your urticaria theory, this would seem to be a different mode of use to that of trying to improve the healing time for soft tissue injuries. With the results you have for urticaria, it appears that maybe the block of the itching for a short period of time works similarly to the pain gate theory (as with use of TENS), ie. the new heat/cold sensation reaching patient awareness before the itching sensation and thus "blocking" the gate to the itching. It's probably the actual alternation between these two states that is the important aspect of the effect - in other words, not giving the system time to accommodate and allow the itching sensation to get through. This would be similar to the modified or burst modes of TENS when the current CHANGES and thus not allows the body to accommodate and make the TENS pulses ineffective. ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%