this is heat lodged in the lungs where it obstructs the flow of qi. it may be caused either by externally-contracted wind-heat, or wind-cold that transforms into heat.

the fever, thirst, yellow tongue coating, and rapid pulse are all indicative of heat. wheezing, coughing, and labored breathing reflect the obstruction of the lung qi. the presence or absence of sweating indicates the extent to which the lungs have been affected. heat in the lungs causes fluids to ‘steam’, which is manifested in sweating. however, in more severe cases the heat will deplete the fluids and there will be little or no sweating.

(bensky & barolet)

this is an early-stage warm-febrile disease which enters through the nose and mouth and attacks the lungs. depending on how much the wei qi is involved, heat in the superficial aspect of the lungs results in fever with or without chills, cough, sore throat, a red-tipped tongue, and a white or yellow tongue coating.

if the pathogenic influence is still in the exterior, the tongue coating will be normal (thin and white). when heat injures the fluids it causes thirst. the floating, rapid pulse reflects the presence of superficial heat.

(bensky & barolet)