When body temperature rises, the sweat glands, stimulated by the parasympathetic nervous system, release sweat; as the moisture evaporates it carries heat away from the skin. Sweat glands are distributed all over the body. There is no harm in stopping sweating only in the underarm area, where it stays trapped and over time also darkens the skin; it also prevents odour and staining of clothes.
The problem can be resolved with a very reliable botox application of about 30 minutes. Restricting the superficial sweat glands for 6 to 8 months brings comfort in every season and prevents discolouration of clothes and underarm skin. In practice, after three underarm applications 6 to 8 months apart, sweating can be reduced permanently by around 60%, because the sweat glands shrink and become less sensitive to stimulation.