What is a Lumbar Sympathetic Block?

This procedure is an injection that numbs branches of nerves in your lower back. It helps doctors find and treat a number of problems linked to these nerves. Usually, a series of injections is needed to treat a problem.

The sympathetic nerves travel along both sides of your spine. They are associated with a wide range of functions that you don’t consciously control. These include your circulation, digestion and sweat production.