The burning of a special herb on or near the skin is called Moxibustion. The material is called "moxa". Moxa is the aged, dried leaves form the mugwort plants that usually grow in the hillside areas. When it burns the temperature at the tip is around 600 °C. It burns very slowly so that the heat can penetrate deep down to the acupuncture point.
The Therapeutic Functions of Moxibustion