The invention relates to a device for treating arthritis and osteoarthritis in extremities, which has the general form of a sheath in the form of a glove or sock comprising: an porous, inner fabric layer (14)； a second layer in the manner of a paraffin-filled bladder (1) that covers the entire inner space, the inner paraffin layer (1) being surrounded by a Teflon splint (2) provided with means for straightening the fingers (nitonol wires or similar), followed by a very thin layer of latex or insulating material (4), and lastly an outer covering (6). Complementarily, the device can comprise wires or resistors (5) around each finger or parallel to the palm or back of the hand. Additionally, the device comprises a control unit (12) for activation and for controlling the temperature and currents to be applied.
