Qing Wei San, also known as Stomach-Heat-Clearing Powder, comes from the book "Spleen and Stomach Theory". This book was written by Li Dongyuan, one of the four great doctors of the Jin and Yuan dynasties. Li Dongyuan is famous in the history of medicine for his in-depth research on the spleen and stomach theory. Qing Wei San is a prescription he created in the process of studying the pathogenesis of the spleen and stomach, targeting the common symptom of stomach fire toothache.
Qing Wei San prescription composition
Qing Wei San is composed of: 3 grams each of Rehmannia root and Angelica sinensis root (6 grams each), 9 grams of Peony bark, 6 grams of Coptis chinensis, 6 grams of Summer Moon, and 1 gram of Cimicifuga heracleifolia (9 grams). The method of use is to grind the above herbs into fine powder, mix them evenly, take one dose each time, boil them with 1.5 cups of water until 70% of the water is boiled, remove the residue and cool before taking. The modern method is usually to boil these herbs into a decoction.

The formula structure of Qing Wei San can be explained according to the principle of monarch, minister, assistant and envoy:
Main drug : Coptis chinensis. Coptis chinensis is bitter and cold in nature, and has the effects of clearing away heat and dampness, purging fire and detoxifying. In Qingwei San, Coptis chinensis is mainly used to clear the fire in the stomach and directly attack the cause of the disease, and is the main drug in the prescription.
Assistant drug : Cimicifuga. Cimicifuga has the effects of raising yang, dispersing fire, detoxifying and clearing rashes. When paired with Coptis chinensis, Cimicifuga can not only lead the drug upward, but also disperse the stagnant fire, so that the upward inflammatory fire can be dispersed and the internal stagnation heat can be reduced.
Adjuvants : Radix Rehmanniae, Cortex Moutan. Radix Rehmanniae cools blood and nourishes Yin, Cortex Moutan cools blood and clears heat. The two work together to nourish Yin and clear heat, preventing stomach heat damage and Yin blood.
Assistant drug : Angelica Root. Angelica Root nourishes blood and invigorates blood circulation, and has the effect of relieving swelling and relieving pain. In the prescription, Angelica Root assists other herbs to achieve the effect of clearing the stomach and cooling blood.
Indications and effects of Qingwei San
Qing Wei San is a traditional Chinese medicine prescription that is mainly used to clear the stomach and cool the blood. It is particularly suitable for treating toothache caused by stomach fire . This type of toothache is usually accompanied by symptoms such as headache, hot and smelly breath, and red, swollen and rotten gums. Qingweisan can effectively relieve these discomforts by clearing away heat and purging fire, making patients feel comfortable.

The main ingredients of this prescription include coptis root, cimicifuga, raw rehmannia root, moutan bark and angelica root. Coptis root is the main herb, responsible for clearing stomach fire, while cimicifuga helps disperse fire, raw rehmannia root and moutan bark have the effect of nourishing yin and clearing heat, and angelica root can activate blood circulation and reduce swelling. These herbs work together to achieve the effect of clearing the stomach and cooling blood.
In modern medicine, Qingweisan is often used to treat diseases such as stomatitis, periodontitis and trigeminal neuralgia . These diseases are mostly caused by stomach fire, which manifests as inflammation and pain in the mouth. Qingweisan can effectively relieve these symptoms and improve the patient's quality of life by regulating stomach fire.
Pathogenesis of Qing Wei San
The pathogenesis of Qing Wei San is mainly related to excessive stomach fire. When there is heat in the stomach, the heat evil will attack along the stomach meridian , leading to a series of symptoms. These symptoms include toothache, headache, hot and smelly breath, red and swollen gums , etc. In severe cases, gum bleeding may also occur.
The stomach meridian runs through the nose, upper teeth, cheeks and forehead, so when stomach fire attacks, these parts are prone to symptoms such as redness, swelling and pain. For example, toothache may be extended to the head, causing headaches, and the cheeks may also become hot. These symptoms are all manifestations of stomach fire attacking the meridians.

In addition, excessive stomach fire may damage blood vessels, leading to gum bleeding and erosion. The patient's tongue is usually red with yellow fur, and the pulse is often slippery and rapid. These are typical manifestations of excessive stomach fire. Qingwei San can effectively relieve these symptoms and restore the body's balance by clearing away heat and purging fire.
Modern Application of Qing Wei San
In modern medicine, Qingwei San is often used to treat stomatitis, periodontitis, trigeminal neuralgia and other diseases that are caused by stomach fire and blood heat, which attack the meridians. These diseases are often manifested as inflammation, pain and swelling in the mouth, which are similar to the symptoms of stomach fire toothache described in traditional Chinese medicine.
Notes
When using Qing Wei San, you need to pay attention to the following points:
People who are not suitable for this prescription should not use it if they have toothache caused by wind-cold or gum swelling, pain and bleeding caused by kidney deficiency and fire inflammation.
Dosage adjustment : The dosage of Coptis chinensis can be doubled in summer because the heat is more severe in summer.
Side effects : Qingwei San is mainly composed of bitter and cold medicines. Long-term use may damage the spleen and stomach, so it is not suitable for long-term use.
Conclusion
As a classic prescription for clearing the stomach and cooling blood, Qing Wei San plays an important role in treating toothache caused by stomach fire with its unique compatibility and remarkable efficacy. Whether in traditional Chinese medicine theory or in modern medical application, Qing Wei San has demonstrated its unique value and broad application prospects. When using it, it should be adjusted according to the specific condition and constitution, and pay attention to the relevant contraindications and side effects to achieve the best therapeutic effect.