A ganglion is a bulge of swelling overlying a joint capsule or tendon sheath, most commonly occurring in the wrist and hand. When there is a weak point in the lining of a joint or tendon potentially caused by overuse, it balloons outwards with fluid, creating the bulge or nodule under the skin.
Signs and Symptoms:
- Hard, rubbery nodule underneath the skin.
- Pain with movement of muscles under the ganglion.
- Pain and tenderness over the nodule.
- No pain when not moved.