The aim of the study: The goal of this retrospective study was to evaluate the outcomes of bilateral thoracoscopic sympathectomy for primary hyperhidrosis. Methods: We identified all patients who underwent bilateral thoracoscopic sympathectomy between January 2017 and May 2020, in Sana’a (capital of YEMEN) hospitals. Details of pre-operative symptoms, surgical procedure and post-operative complications were collected from the patient’s files, and each patient was sent a questionnaire regarding success of the procedure, and compensatory sweating through their phone number by what Sapp. Results: We had 36 patients complaining of hyperhidrosis: 27 cases were males and 9 cases were females, age range 14 - 32 years at the time of surgery. All of them suffered from hyperhidrosis in the palm and sole, 15 cases of them suffered from hyperhidrosis in axilla, and 10 cases of patients were associated with facial blushing. All cases improved from sweat in the palm (100%), and most of them improved from the sweat of sole (94.6%). Conclusion: Thoracoscopic sympathectomy is effective in the treatment of hyperhidrosis. However, compensatory hyperhidrosis seems unavoidable complication and infrequently improves with time, so patients should be clearly informed before committing to surgery.