Underarm excessive sweating, also called axillary hyperhidrosis, is an uncontrollable, annoying, embarrassing, and isolating problem (to say the least). From the discomfort of sweat running down your sides, to the embarrassment of obvious sweat stains, to the fear of being “discovered,” uncontrollable underarm sweating can feel like it’s ruining your life. Excessive sweating almost never causes physical harm, but the social and...