Learning About a Sympathetic Nerve Block

What is a sympathetic nerve block?

A sympathetic nerve block is a shot of medicine around nerves in your neck or back. This nerve block is used for problems such as chronic regional pain syndrome and pain from some types of cancer.

Sympathetic nerves spread out from your spine. They control some of the body functions you have no control over, like blood flow and digestion. They also carry pain signals. When this system isn't working right, you can have long-term (chronic) pain.

The nerves come together in groups called ganglions throughout your body. This is where the nerve block is done. Your doctor will decide which group of nerves needs this treatment depending on where your pain is.

The nerve block contains anesthetic, which usually numbs the nerves. It may also contain a steroid, which may reduce swelling and pain. Steroids take a few days, and they don't always work.

How is a sympathetic nerve block done?

The doctor may use ultrasound or another way to help guide the shot for the nerve block. After finding the right spot, the doctor numbs the skin. Then the doctor puts the nerve block near the nerves. If you are awake, you may feel some pressure. But you should not feel pain.

What can you expect after a sympathetic nerve block?

You will probably go home about an hour after the nerve block.

When the nerve block works, you may feel pain relief right away. Sometimes the pain comes back after the medicine wears off.

If your nerve block also had a steroid in it, it may take a few days to relieve the pain.

This type of nerve block may not always work.

Rest when you feel tired. You can do your normal activities when it feels okay to do so. Pain relief can last for several days to a few months or longer. The block may need to be repeated.

Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and contact your doctor if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.