The water droplets discharged from mud moxibustion are dampness. Mud moxibustion is a traditional Chinese medicine treatment method, which is through the natural rock contained in the clay through mineral heat radiation and special penetrating power, to stimulate acupuncture points and dredge the veins, which can get rid of the six evil spirits in the body, namely wind, cold, summer, dampness, dryness and fire. At the same time, by dilating local capillaries and promoting blood circulation, it can promote inflammation and swelling to subside and facilitate pain relief. Dampness is also a TCM theoretical concept, TCM believes that dampness in the body is the easiest to penetrate, considering that it may be related to dietary habits and living environment, through mud moxibustion can effectively help to get rid of dampness. Mud moxibustion makes the local skin temperature rise, which can form a thermal environment, when the local epidermal temperature and subcutaneous and intramuscular temperature temperature difference, can increase the local blood circulation and lymph circulation, enhance the local skin metabolic capacity, promote the secretion of sweat glands to increase, metabolic products excretion, when the body’s dampness can be gradually discharged. Mud moxibustion can also be clinically applied to local soft tissue injuries, lumbar disc protrusion, frozen shoulder and other conditions, but it should be noted that the mud moxibustion process to follow the doctor’s instructions to prevent local skin burns, it should be noted that mud moxibustion is not suitable for allergic and pregnant women to use. If there is local redness and swelling after mud moxibustion, the skin is black and purple, which is generally normal and can subside on its own, so there is no need to worry too much.