Blisters from Iontophoresis?

I've been using the RA Fischer machine as instructed. After 4 treatments, I've noticed very small blisters on the back of my fingers. Is this something I should be concerned about? Should I continue treatment as instructed? The blisters are small but my fingers do seem red and swollen at those points. Thanks!

Either cut back on the intensity settings and/or take a couple of days off from treatment. In all my years of treatments I never gotten blisters or swollen fingers. It may take some time for your hands to get used to the treatments.

@Sprawling, Thanks, will do.