The three points discussed in this paper are: 1. Improvement in walking distance. 2. Post-sympathectomy neuralgia. 3. Post-sympathectomy ejaculatory problems. The experience in the paper was derived from 2,450 operations of lumbar sympathectomy carried out between the years of 1947 and 1972. The claudicant patients were divided into 3 main groups. Those who were not treated by any form of surgery, those who could walk for 200 yards before claudication and those who could walk less than 100 yards before claudication, the latter two groups having been treated by lumbar sympathectomy. The results show a considerable difference in the two groups treated and compare favourably with the untreated cases.