Next, botulinum toxin A solution will be mixed per standard protocol in the dermatology clinic and will be applied and evenly spread over the palm. This will be followed by occlusion with an occlusive wrap such as saran wrap or a silicone based gel. The subject will be asked to keep the saran wrap in place for 1 hour. Botulinum toxin A is an FDA approved product for the treatment of hyperhidrosis.