Cold sensitivity as a new side effect after sympathicotomy for hyperhidrosis.

Extremity cold sensitivity is a previously unreported side effect of thoracoscopic sympathicotomy. We report a case of a young man who underwent thoracoscopic sympathicotomy for hyperhidrosis, after which cold sensitivity developed in his sympathicotomized right hand and arm. When exposed to cold, the right hand and forearm become numb and the skin temperature drops to uncomfortable levels, while the left extremity remains comfortably warm.