Why is Botox given for excessive sweating in the Under Arms?
Botox is FDA approved only for injection in the underarms (also called axillary) . The advantage is that is treats the specific area of sweating. Patient with axillary sweating may have an increased incidence of compensatory sweating when treated with thorascopic sympathectomy (or called ETS). So Botox is a very good option after trying topical agents, but before the sympathectomy procedure.

How is Botox given to Under Arms?
Botox is injected just under the skin of the axillary hair area. The injections are done in the office. It involves minimal discomfort since the needle used is very thin. Fifty units are typically injected on each side and often relief of sweating will last 6-7 months.