I am 47 years old, and have had it all my life. I can sit in a chair and break out sweating, or wake up in the morning with a soaked pillow. Today the treatment of choice for moderate to severe hyperhidrosis at these sites is Endoscopic Thoracic Sympathectomy. This minimally invasive endoscopic technique has been developed in recent years to replace conventional open surgery, a very traumatic procedure. In the hands of a surgeon experienced in this type of procedure, the technique is very safe and leads to cure in nearly all patients.
Total anaesthesia is required.
All that can be seen later is a small scar in the armpit. Complications are very rare and, generally, of minor importance, requiring at most a day or two extra hospital stay. Sorry, have no information on pharmacological or chemical sympathetic blockade.