Moxa, or Moxibustion, is the process of burning Moxa – a charred herb known as Artemisia vulgaris or mugwort. When burned on or over the skin, moxa produces deep penetrating warmth that stimulates and moves Qi or energy. Moxibustion has been used successfully to reduce pain and swelling resulting from exercise and athletics, especially in joints and back. Moxa is also commonly used on the abdomen and legs for digestive problems and is an invaluable therapy for certain types of menstrual pain.