Permanent Solution for Underarm Sweating The MiraDry procedure is the only FDA-approved procedure that can cure underarm sweating. With 2 sessions, patients report up to 80-90% improvement in their underarm sweating or hyperhidrosis. As the number one MiraDry doctor in New York, I have developed a protocol for numbing that makes the procedure virtually painless and the safest way to protect the nerves in the underlying area. We use a single entry point method with a cannula to numb the entire su