Hi and thank you for your question!
It is always best to refer the practice where you had your procedure performed with any and all concerns/questions. That said, it is not unusual for patients to have some lumpiness in the under arm area after miraDry for several weeks and rarely for several months after the procedure. I recently had the procedure and experienced soreness and lumps, just like you. What I found to be very helpful is massaging the area in the shower with the warm water, daily. This helped relieve both the soreness and the lumpiness. Refer to your provider for further instructions. It will get better, everyone is different as to how quickly it will resolve.
Overall, the downtime for me was minimal and I am am so thrilled to not have to deal with sweat and odor or wearing deodorant!
Dr. Grant Stevens