The electric hydrotherapy bath with four limbs features calming effects to relieve upper limb muscle tension, spasms, and pain caused by joint injuries or stiffness. It effectively addresses foot and leg muscle spasms, arthritis, gout-related pain, insomnia, post-exercise lower limb fatigue, and muscle rigidity due to trauma or burns. Equipped with direct current therapy, it serves as an auxiliary treatment for neurasthenia, acute sprains, frozen shoulder, and arthritis. Ideal for hospitals, rehabilitation centers, nursing homes, and similar facilities