What is a Sympathetic Block (Cervical or Lumbar)?
The sympathetic nervous system controls autonomous functions such as heart rate, blood pressure and the gastrointestinal tract. When it malfunctions, it can cause uncontrolled chronic pain. The commonest sympathetically mediated pain, or reflex sympathetic dystrophy (RSD or CRPS), can respond to a block of the cervical or lumbar sympathetic nerves. The block may take only a few minutes but may relieve pain for months.