Ganglion Dr Rob Hicks A ganglion is a type of cyst containing clear fluid or jelly. It usually develops from the capsule surrounding a joint or the sheath around a tendon, and is most common on the back of the wrist.

In this article

What are the symptoms?

Who's affected?

How are they treated?

Ganglions range in size from that of a small pea to that of a plum. They're usually found on the back of the wrist, but also appear at its front, or on the palm or fingers.

They're harmless and in general don't cause any problems

They're harmless and in general don't cause any problems, but when large they're more likely to get knocked, and if visible they can cause embarrassment.

Occasionally, a ganglion may become inflamed and feel uncomfortable, and in rare cases it may compress a nearby nerve. If this occurs, odd sensations may be felt in the hand, and finger movements may become difficult.

Ganglions are common and can occur at any age to both sexes.

As no one really understands why ganglions occur, it's not possible to prevent them. They don't need treatment and many disappear of their own accord, but if a ganglion is causing discomfort or embarrassment, it can be surgically removed.

It's important to do this if the ganglion is causing symptoms related to nerve compression.

This article was last medically reviewed by Dr Rob Hicks in April 2008