Journal of neurosurgery. Spine 2005 Feb
Overall, 88 patients (96.7%) developed compensatory hyperhidrosis, with the mean initial occurrence at 8.2 weeks. The symptoms of compensatory hyperhidrosis progressively worsened to the maximum degree within another 2 weeks after onset (mean 10.3+/-1.83 weeks). In 19 patients (21.6%), symptoms of compensatory hyperhidrosis improved spontaneously within 3 months after sympathectomy (mean 13.3 weeks). Postoperative compensatory hyperhidrosis occurred in 71.4% of patients within the 1st year. Recurrent sweating occurred in only 17.6% of patients. None of these patients required repeated operation. The earliest onset of recurrent sweating was noted at 2 weeks postoperatively by three patients, and the mean initial postoperative reccurrence was 32.7 weeks after surgery.