About This Formula*
Traditional Chinese Medicine background and properties
Formula Description*
A classical formula for serious febrile (feverish) illnesses where Heat has penetrated deep into the body, causing high fever that worsens at night, restlessness, disturbed sleep, and sometimes delirium. It works by clearing deep-seated Heat, protecting the body's fluids from being dried out, and guiding the pathogenic Heat back outward where the body can expel it more easily.
Formula Category*
Main Actions*
- Cools the Nutritive Level
- Resolves Heat Toxins
- Vents Pathogenic Heat Outward
- Nourishes Yin
- Generates Fluids
- Cools the Blood
- Invigorates Blood and Dispels Stasis
TCM Patterns*
In TCM, symptoms don't appear randomly — they cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Qing Ying Tang is traditionally associated with these specific patterns.
The following describes this formula's classification within Traditional Chinese Medicine theory and is provided for educational purposes only.
Why Qing Ying Tang addresses this pattern
This is the primary pattern for Qing Ying Tang. When warm-Heat pathogenic factors penetrate from the Qi level into the deeper Ying (nutritive) level, they lodge in the Yin aspect of the body and disturb the Heart spirit. The Heat intensifies at night because nighttime is when the body's Yang naturally moves inward to the Yin level, where it encounters and amplifies the trapped Heat. The formula's King herb (Shui Niu Jiao) directly clears the Heat-toxins from the Ying level, while the three Deputies (Sheng Di Huang, Xuan Shen, Mai Dong) replenish the Yin fluids being scorched by the Heat. Crucially, Jin Yin Hua, Lian Qiao, and Zhu Ye Xin provide an exit route for the pathogenic Heat to vent back outward to the Qi level, embodying the famous Warm Disease principle of 'venting Heat to redirect it to the Qi level' (透热转气). Huang Lian drains Heart Fire directly, while Dan Shen cools and moves the Blood to prevent stasis.
A practitioner would look for one or more of these signs
High fever that worsens at night (身热夜甚)
Restlessness with difficulty sleeping (神烦少寐)
Occasional delirious speech (时有谵语)
Faint, early-stage skin rashes (斑疹隐隐)
Thirst or paradoxically no thirst (口渴或不渴)
Deep red (crimson/绛) tongue that is dry
Why Qing Ying Tang addresses this pattern
When Warm-Heat pathogens invade the Pericardium (the 'palace' that protects the Heart), the Heart spirit is directly disturbed, producing agitation, delirium, and abnormal eye behavior (eyes constantly open or constantly shut). The Wen Bing Tiao Bian specifically prescribes Qing Ying Tang for Summer-Heat entering the Hand Jueyin (Pericardium) channel. Shui Niu Jiao and Huang Lian work together to clear Heat from the Heart and Pericardium, Mai Dong nourishes Heart Yin, and Dan Shen cools the Blood within the Heart system. In severe cases of clouded consciousness, this formula is often combined with An Gong Niu Huang Wan or Zhi Bao Dan to open the orifices.
A practitioner would look for one or more of these signs
High fever with agitation
Delirious speech or confused consciousness
Severe restlessness, unable to sleep
Crimson red tongue tip
Why Qing Ying Tang addresses this pattern
When nutritive-level Heat further deepens to affect the Blood level, early signs of bleeding or blood extravasation appear as faint rashes (斑疹隐隐). The tongue becomes deep crimson. While Qing Ying Tang is primarily a Ying-level formula, it contains Blood-cooling ingredients (Shui Niu Jiao, Sheng Di Huang, Dan Shen) that address early Blood-level involvement. Shui Niu Jiao cools the Blood and resolves macules, Sheng Di Huang cools and nourishes the Blood, and Dan Shen prevents Heat from binding with stagnant Blood. If Blood-level symptoms become prominent (active bleeding, pronounced rashes), the formula would typically be changed to or combined with Xi Jiao Di Huang Tang, which more aggressively addresses Blood-level Heat.
A practitioner would look for one or more of these signs
Emerging skin rashes or petechiae (斑疹隐隐)
Persistent high fever
Deep crimson tongue
How It Addresses the Root Cause*
Qing Ying Tang addresses the critical moment in a febrile illness when pathogenic Heat breaks through the Qi level (the body's outer defensive layers) and sinks into the Ying (Nutritive) level, the deeper functional layer closely associated with Blood and the Heart. The Ying level circulates nourishment through the blood vessels, and when scorching Heat lodges here, it simultaneously damages the body's Yin fluids and disturbs the Heart spirit.
Because the Ying level belongs to Yin and is most active at night, fever characteristically worsens after dark. The Heat agitates the Heart, producing restlessness, insomnia, and even delirious muttering. The tongue turns deep crimson red (绛) as Heat scorches the Ying, and it becomes dry as fluids are consumed. A telling paradox may appear: the patient is expected to be thirsty (Heat normally dries fluids), yet feels no thirst, because the Heat is trapped deep in the Ying level where it steams fluids upward to moisten the throat without truly quenching the body's deeper dehydration. Faint skin eruptions (斑疹隐隐) may begin to appear, signalling that Heat is starting to force Blood out of the vessels.
This pattern sits at a pivotal crossroads: if left unchecked, Heat will advance further into the Blood level, causing hemorrhaging and severe delirium. But because the pathogen has only recently entered the Ying level, there remains an opportunity to reverse its course. Ye Tianshi's famous principle, "when Heat enters the Ying level, one can still vent Heat back to the Qi level" (入营犹可透热转气), captures this window of therapeutic opportunity. The formula simultaneously cools the Ying level from within, vents Heat outward toward the Qi level, protects the Yin fluids being consumed by the Heat, and prevents Blood stasis from forming as Heat thickens the Blood.
Formula Properties*
Cold
Predominantly bitter and sweet with salty notes. Bitter to clear Heat and drain Fire, sweet to nourish Yin and generate fluids, salty (from Water Buffalo horn) to enter the Blood level and soften hardness.
Formula Origin
This is just partial information on the formula's TCM properties. More detailed information is available on the formula's dedicated page
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
