Usually not painful cyst on the wrist, which can grow without proper care. It can disappear with time by itself or it is possible to surgically remove it. Taping has only a supporting role.
Place the base of the Y tape above the problematic place and stick it along the outside forearm.
Place the second tape on your wrist (side of the little finger) and stick the tape with gentle stretch in the direction from the little finger to the thumb around the ganglion. Let a gap between the endings of the tape.