Fire by nature flames upward

Fire is characterized by rising flames, and diseases in the body attributed to fire are associated with upper body heat signs. Distinction is made between repletion and vacuity fire. Repletion fire includes fire heat damaging the lung, which causes panting and cough, coughing of blood, and nosebleed, and fire distressing the heart spirit, which manifests as headache, vomiting, clouded spirit, and delirious raving. Vacuity fire, which is yáng hyperactivity due to yīn vacuity stemming from depletion of essence-blood, manifests as vexation and agitation, sore throat, hoarse voice, bleeding gums, and tinnitus. Most of these signs reflect the upward flaming nature of fire.