Everyone is born with a set of qualities - a certain amount of lightness, heat, and heaviness. When that genetic ratio of qualities is maintained, a healthy state is common.
If diet, environment, lifestyle or other factors add excessive lightness, heaviness, or heat, then illness develops. Illness can be improved by reducing the excess or adding the opposite qualities.
Excessive lightness is associated with problems of spasm, spaciness, nerve problems, and dryness.
Too much heat causes inflammations such as gastritis, esophagitis, enteritis, colitis, dermatitis, and other inflammations.
Causes congestions involving blood vessels, sinuses, blood thickening, and tumors.
The longer an excess persists, the more invasive and damaging it becomes.