Sympathetic Nerve Block

What are the sympathetic nerves?

The sympathetic nervous system is a network of nerves all over your body. The nerves branch from your spine. They control some body functions. These include closing blood vessels and opening the sweat glands. A problem with these nerves can affect blood flow. Symptoms are often felt in the hands or feet. They may hurt, burn, feel cold, or be sore to the touch.

Sympathetic ganglions

The sympathetic nervous system is controlled by bunches of nerves called ganglions. One large ganglion, called the stellate ganglion, helps control nerves in the upper body. In the lower body, nerves are controlled by several ganglions that make up the sympathetic chain.

Risks and complications

Risks and complications are rare, but can include:

• Bleeding or fluid leaking in the spinal cord.

• A hole (puncture) in a blood vessel.

• Infection.

• Lung puncture (collapsed lung).

• Nerve injury.