Localised hyperhidrosis may also be due to:
▪ Stroke
▪ Spinal nerve damage
▪ Peripheral nerve damage
▪ Surgical sympathectomy
▪ Neuropathy
▪ Brain tumour
▪ Chronic anxiety disorder
http://www.dermnet.org.nz/hair-nails-sweat/hyperhidrosis.html
"Sympathectomy is a technique about which we have limited knowledge, applied to disorders about which we have little understanding." Associate Professor Robert Boas, Faculty of Pain Medicine of the Australasian College of Anaesthetists and the Royal College of Anaesthetists, The Journal of Pain, Vol 1, No 4 (Winter), 2000: pp 258-260