The hot and humid compress device is a kind of instrument which can effectively relieve the chronic pain by putting the hot compress bag with high heat preservation and moisturizing material into the water, and then the heat and steam can act on the treatment site, which can effectively relieve chronic pain. Damp heat can make local blood vessels dilate, increase blood flow, enhance metabolism and improve nutrition. Dampness and heat can increase capillary permeability, promote the absorption of exudate, eliminate local swelling, reduce the excitability of sensory nerve, increase the threshold of nerve pain and relieve pain; damp heat can also relieve muscle spasm and soften scars. The heat preservation time of the hot compress bag can be as long as 20 ~ 30 minutes. It can be used repeatedly. It has good softness and can be folded. It is suitable for any part of the body. The treatment method is simple and convenient, time-saving and labor-saving.