Moxibustion involves the burning of the moxa herb 艾 directly on or near the skin. In Oriental medicine we consider the duality of both Yin and Yang ( a theory based on the relationship of each part ) and, depending on how moxa is used and prepared before use, moxibustion can be thought to increase either the Yin or the Yang energy within the body. For example, because it is hot ( Yang ) then the resulting cooling effect ( Yin ) will be increased ( like sweating- which cools the body ). We can think about general inflammation/ fever etc. Applying heat to inflammation / tight areas encourages the bodies defensive mechanism to come into play and thus reduce/ stabilise inflammation or tightness. Moxa is particularly beneficial for people with chronic low-grade systemic inflammation or compromised immune systems. It can also significantly reduce painful swelling caused by trauma from sports injuries/ post-operative surgery. Moxa has a general systemic effect on the body by strengthening and liberating the immune system.