A thermal treatment device formed to the shape of the human hand. The device may include an inner layer formed to surround the hand, and having an opening in one end to allow the hand to be inserted therein, and an outer layer formed to surround the inner layer and forming at least one pocket between the inner layer and the outer layer. A thermal gel occupies the pocket, the thermal gel retaining a temperature to which it is subjected and transmitting said temperature via the inner layer.