Thanks, Maryellen, for responding. The copper bars are causing the burning. Today I tried two layers of cotton (instead of one) between the skin and the copper bars. This seems to be too much, could hardly feel any pulsating at all. Tomorrow I will try your suggestion of paper towels.
Where exactly around the ankles would you put the copper bars? Both bars on one ankle, as with wrists? Or one on each ankle, but where?
Thanks for your input.