Syndrome differentiation and treatment
The therapeutic principles of pneumonia lie in dispersing the lung to eliminate asthma, clearing away heat and resolving phlegm. For the patients with the heart yang deficiency and blood stasis due to qi stagnation, warm and nourish the heart yang so as to promote blood circulation to remove blood stasis; for the patients with pathogenic factors invading Jueyin meridian, calming the liver to expel wind, clearing away heat from the heart to promote resuscitation are used. At the late stage, weakened body resistance and lingering pathogenic factors are treated by nourishing yin to clear away heat from the lung, supplementing qi to tonify the spleen.

1. Wind and cold tightening the lung 
Main symptoms and signs: Aversion to cold, fever, anhidrosis and no thirst, cough, short breath, whitish and thin sputum, reddish tongue with whitish or whitish-greasy fur, floating and tight pulse.
Therapeutic methods: Removing pulmonary obstruction with pungent and warm-natured drugs, checking cough and resolving phlegm.

2. Wind and heat tightening the lung 
Main symptoms and signs: Fever, aversion to  cold, profuse sweat, thirst with preference to drink, cough with yellowish sputum, short breath, reddish  throat, red tongue with thin and yellowish fur, floating  and rapid pulse.
Therapeutic methods: Dispersing the lung with pungent and cool-natured drugs, clearing away heat and resolving sputum.

3. Phlegm and heat tightening the lung 
Main symptoms and signs: High fever, dysphoria,  short breath, flapping of ala nasi, thoat rale, dry mouth with thirst, reddish complexion and lips or cyanotic lips,  red tongue with yellowish and greasy fur, slippery and  rapid pulse.
Therapeutic methods: Clearing away heat, dispersing the lung, resolving sputum and eliminating asthma.

4. Deficiency of the heart yang 
Main symptoms and signs: Sudden pale complexion, cyanotic lips and nails, worsened dyspnea, sweat with cold limbs, listlessness or dysphoria, mass in the right hypochondrium, pale and purplish tongue with thin and whitish fur, feeble and rapid pulse.
Therapeutic methods: Warming and strengthening heart yang and restoring the depleted yang to save collapse.

5. Invasion of Jueyin (pericardium) by pathogenic factors 
Main symptoms and signs: High fever, coma,  dysphoria, delirium, lockjaw, stiff neck, clonic convulsion of limbs, upward staring of the eyes, red tongue with  yellowish and greasy fur, thready and rapid pulse.
Therapeutic methods: Calming the liver to expel wind, clearing away heat in the heart to promote resuscitation.