A ganglion cyst is a lump filled with liquid, most often near joints or tendons on your wrist or fingers. It may hurt and sometimes changes in size or goes away on Riders on the Storm: Stellate Ganglion Block for Electrical Storm EM Ultrasound Section This is an annoying injury but it can be helped!, Ganglion cysts can be painful but they can also be painless. If its painful it may be acute and inflamed or potentially pushing on a nerve, in which Ganglion Cysts of the Wrist Anesthesia Key