The cause of ganglion cysts is unclear though some thought is that repetitive wrist
trauma may increase the risk.
Ganglions at the wrist are most commonly found between the ages of 15 and 40 years.
Cysts that develop at the end joint of a finger, mucous cysts, are more commonly
caused by arthritis in the finger joint.
Symptoms include a hard bump, pain with wrist motion, and occasionally numbness
or tingling of the hand. Some smaller ganglions can remain hidden under the skin.