Posing in pose-mode doesn´t move origin of a mesh

When I move mesh in pose-mode the origin of the mesh doesn´t follow so I can´t use symmetry in sculpt mode within the single mesh. Before I pose the hand, the symmetry is ok, I can sculpt with X symmetry, but after posing it doesn´t work. How do I make the origin to follow the mesh so I can sculpt in the pose I choose?

Pose-Mode - origin doesn´t move