Hi, I had the same concerns when treating my upper lip. At first, I scheduled my appointments during the evenings so that I could monitor the reaction. I get a little swollen and red, but it would usually disappear by the time I got home. If you are really concerned, this is what I used to do until my skin got used to it: get plenty of sleep, drink water, avoid refined carbohydrates or salty food the day of your treatment, and taking a benadryl before your appointment.
