Ganglion cysts are small fluid filled synovial sacs that form on the hand, wrist, ankle, knee or shoulder. They are attached to tendon sheath or joint capsules and are usually not painful, but may occasionally impede movement. They can be a small as a poppy seed or as large, or larger, than a cherry.
Massage is locally contraindicated and direct pressure should not be applied to the cyst. It is important to get a correct diagnosis to make sure the lump is a ganglion cyst and not caused by a more serious condition.