Sympathectomy is by no means a benign procedure, and sympathectomy for sweating can induce pain and allodynia

"Sympathectomy is by no means a benign procedure, and sympathectomy for sweating can induce pain and allodynia at the border zone which is sometimes associated with pronounced increase in sweating in that area." (p. 534) Surgical Disorders of the Peripheral Nerves by Rolfe Birch Springer, Jan 21, 2011 - Medical - 512 pages original article published in Ann R Coll Surg Engl 2002; 84:181-184"