The human body is comprised of qi (or called Qi, pronounced chee) and blood. Qi is the energy force that gives us our capacity to move, think, feel, and work. Blood is the material foundation out of which we create bones, nerves, skin, muscles, and organs. The body is divided into five functional systems known as Organ Networks. These Networks govern particular tissues, mental faculties, and physical activities by regulating and preserving Qi and Blood.

Qi and Blood circulate within a web of pathways called channels (meridians), that link together all parts of the organism. We are healthy when adequate qi and Blood flow smoothly. Symptoms as varied as joint pain, headaches, anxiety, fatigue, menstrual cramps, high blood pressure, asthma, indigestion, and the common cold occur when their circulation is disrupted.

All illness is understood as a consequence of either depletion or a congestion of qi and Blood. Depletion of qi leads to weakness, lethargy, frequent illness, poor digestion, and inadequate blood flow. Congestion results in aches, tension, tenderness, pain, a distended abdomen, irritability, and swelling.