What is ganglion???

A ganglion is a small, fluid-filled sac or cyst that forms on or near a joint or tendon. It is typically round or oval-shaped and can vary in size. Ganglions are most commonly found on the wrist, hand, or foot, but they can also occur in other areas of the body. The exact cause of ganglions is unknown, but they are thought to develop when the tissue surrounding a joint or tendon bulges out, forming a sac and filling with fluid. Ganglions are usually harmless and painless, but they can sometimes cause discomfort or limit movement if they press on nearby nerves or tendons. Treatment options for ganglions include observation, aspiration (draining the fluid with a needle), or surgical removal.