The study involved 173 patients with Sudeck syndrome and examined periarterial cryosympathectomy of the forearm vessels alongside conventional comprehensive treatment. The authors report favorable outcomes in 96% of cases when cryosympathectomy was included in treatment. In contrast, the effectiveness of surgical neurolysis of peripheral nerves did not exceed 50%; persistent decompensation of peripheral blood flow and autonomic function was observed in half of the patients.