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. But there is good news; safe treatment for excessive sweating is available. BOTOX is injected into the skin to treat the symptoms of severe underarm sweating (severe primary axillary hyperhidrosis). The result of decrease sweating under arms will last at least 6 months.