My armpit would not numb during a miraDry procedure. What are some suggestion for the next go around?

Hello, I had my first Miradry procedure with great results. I am going back for the 2nd procedure in 1 month. Unfortunately most of my arm pit would not numb. They did use the suggested Tumescent approach. I did not use epi because I am typically very sensitive to it. Could this be the problem? What is the suggestion for the next go around?