Vacuity pattern

Any disease pattern arising from weakness of the body’s forces and absence of any evil. Vacuity patterns are attributed to insufficiencies of qì, blood, yīn, and yáng that arise from damage to right qì either through enduring illness, loss of blood, seminal loss, and great sweating, or by invasion of an external evil (yáng evils readily damage yīn humor and yīn evils readily damage yáng qì), constitutional weakness, or the wear and tear that comes with age. Since these insufficiencies frequently affect specific organs, further distinction is made between such forms as heart yīn vacuity, liver blood vacuity, kidney yáng vacuity, and lung qì vacuity.