Sweating (hyperhidrosis) is caused by over-stimulation of the sweat glands by the sympathetic nerves, and in most cases there is no other underlying disorder. The palms of the hands and the soles of the feet have the highest concentration of sweat glands and therefore these two areas are most commonly affected by hyperhidrosis. Hyperhidrosis can also affect the armpits, face, scalp and body.
Over-stimulation of the sympathetic nerves can also cause excessive facial blushing.
ETS is an operation performed under general anaesthesia, which involves ablation of the sympathetic chain in the chest using minimally invasive surgery. It calms the sympathetic nerves of the upper body that are overactive in people with excessive hand sweating and/or facial blushing.