A ganglion is a harmless cyst that grows beneath the skin on the hand or on the foot. The most common site is the back of the wrist. The lump is small and rubbery to touch. It is caused by fluid from a joint or tendon sheath swelling into the surrounding areas. It is similar to how a water balloon would bulge between your fingers if you squeezed it.

No one knows why we develop ganglions. Sometimes there has been a history of an injury or repetitive stress.

Usually ganglions are painless. Sometimes the cyst is in a position that allows a nerve to be pinched, and causes pain. Occasionally ganglions become big enough to interfere with movement. Unless ganglions are painful or interfere with function no treatment is necessary.

Your healthcare provider should look at any lumps or changes in your skin. If the ganglion is troublesome it can be drained with a needle or surgically removed. Ganglions come and go. They can come back even after surgical removal.

If you have a ganglion drained or removed it is wise to:
* rest the area,
* use ice compresses, and
* take anti-inflammatory medication like aspirin or ibuprofen until the post-surgical soreness and swelling are gone.

Recovery may take a few days to one week. Gradually begin to use the area as it becomes comfortable.

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