Risks
Side effects of sympathectomy may include decreased blood pressure while standing, which may cause fainting spells. After sympathectomy in men, semen is sometimes ejaculated into the bladder, which may impair fertility. After a sympathectomy done by inserting an endoscope in the chest cavity, patients may experience chest pain with deep breathing. This problem usually disappears within two weeks. They may also experience pneumothorax (air in the chest cavity).