I have been going to physical therapy over the past 3 weeks for tendonitis in my ankle. The PT has used Iontophoresis with Dexamethasone during each visit. The last three appointments, he used a bandaid version powered by a watch battery that you wear for 3-6 hours.

So here is my dilemma. The ankle is much better. A week ago, it was almost 100% better with no pain, swelling was down, etc. But then my entire foot started swelling and I have pain over the top of my foot near my toes and on the bottom of my foot near my heel. The PT thinks I may be having an allergic and/or adverse reaction to the Iontophoresis and he's not going to do it anymore. I'm not having any itching (but maybe the residual Dexamethasone is masking that?), but my foot is puffy and bright pink, and the swelling gets worse if I ice it. I did a little research on the internet and found that Iontophoresis can cause temporary nerve and blood vessel damage. I did get a minor electrical burn from one of the first treatments, so maybe my PT had the power turned up too high? PT's out there...does this sound like an allergic reaction to you? I just do not understand what is going on and I'm really quite frustrated!