Huai Hua San is a traditional Chinese medicine prescription that belongs to the category of blood-regulating drugs. This prescription first came from the "Puji Benshi Fang" and is composed of four herbs: pagoda flower, cypress leaf, nephrite spike and citrus aurantium. The dosage of each herb is 12 grams, except for nephrite spike and citrus aurantium, which are used in 6 grams.
Huai Hua San prescription
The composition of Huai Hua San is as follows:
Sophora japonica flower stir-fry (12g)
Roasted cedar leaf pestle (12g)
Nephrite spike (6g)
Stir-fried Citrus aurantium and glutinous rice flour (6g)

Huai Hua San is a deciduous tree of the Leguminosae family. It is bitter and slightly cold in nature. It enters the liver and large intestine meridians and has the effect of cooling blood and clearing heat. Huai Hua San is often used to make tea and is especially suitable for drinking in summer. Huai Hua San used for making tea and is also called "sophora japonica rice", which refers to the unopened flower buds.
The four herbs in Huai Hua San all contain volatile oil components, which have good antibacterial effects. However, the previous processing methods would destroy these volatile oil components. Therefore, in the future processing technology, it is possible to consider retaining these volatile oil components to enhance the clinical application of Sophora japonica powder.

Huai Hua San effect
The main effects of Huai Hua San are clearing the intestines and stopping bleeding, dispersing wind and promoting qi circulation. It is mainly used to treat blood in the stool caused by wind, heat, dampness and toxicity blocking the intestines and damaging the blood vessels. Specifically, it is suitable for bleeding before and after defecation, blood in the stool, and hemorrhoid bleeding, with bright red or dark blood, red tongue, yellow fur and rapid pulse .

Huai Hua San has significant effects in treating hemorrhoids due to its effects of clearing the intestines, stopping bleeding, dispersing wind and promoting qi.
Patients with hemorrhoids often have blood in their stools, which is caused by wind-heat or damp-heat in the intestines blocking the blood in the intestines and damaging the blood vessels. The Sophora japonica flower in Huai Hua San has the effect of cooling blood and clearing heat, while the cypress leaf has the effect of stopping bleeding and removing blood stasis, and the mustard seed and the bitter orange peel can dispel wind and promote qi circulation, helping to relieve intestinal discomfort.
Huai Hua San pathogenesis
Huaihua San treats intestinal wind and visceral toxins, which are caused by wind-heat or damp-heat evil toxins blocking the blood in the intestines, damaging the blood vessels, and causing blood to overflow. The bleeding of intestinal wind is fresh and straight, usually before defecation; while the bleeding of visceral toxins is more stagnant and occurs before or after defecation. The treatment is mainly to clear the intestines and cool the blood, and also to dispel wind and promote qi.

Hemorrhoids are a common anorectal disease, mainly characterized by pain, swelling and bleeding in the anus. Hemorrhoids are caused by a variety of reasons, including long periods of sitting, constipation, pregnancy, improper diet, etc. Hemorrhoids are divided into internal hemorrhoids, external hemorrhoids and mixed hemorrhoids. Internal hemorrhoids are often accompanied by blood in the stool, while external hemorrhoids are mainly characterized by pain and swelling.
Clinical studies have shown that Huai Hua San has a good effect in treating hemorrhoids. A study observed 100 patients with hemorrhoids and the results showed that patients who took Huai Hua San had significant improvements in blood in the stool, pain and swelling. In addition, Sophora japonica powder can promote intestinal peristalsis and improve constipation, thereby reducing the recurrence of hemorrhoids.
Modern Research on Huai Hua San
Modern medical research shows that the four herbs in Sophora japonica powder contain volatile oil components, which have good antibacterial effects and can effectively inhibit bacterial infections in the intestines, thereby reducing the onset of hemorrhoids and the occurrence of blood in the stool. In addition, Sophora japonica flowers and Cypress leaves in Sophora japonica powder also have anti-inflammatory effects, which can reduce inflammation and swelling caused by hemorrhoids.

Huai Hua San is mainly used in clinical practice to treat blood in stool, hemorrhoid bleeding and anal fissure bleeding. In modern medicine, it is often used to treat hemorrhoids, colitis or other blood in stool caused by wind-heat or damp-heat evil toxins blocking the intestines and damaging the blood vessels. It can also be used to treat blood in stool caused by intestinal cancer.
In addition, it is also used to treat ulcer inflammation, oral ulcers, jaundice, dysentery, vomiting blood, epistaxis, hemorrhoidal bleeding, heat rash, cervical lymph node tuberculosis, colds, wind-cold, rheumatism, arthritis, skin itching, traumatic bleeding, blood stasis, headache, muscle soreness, joint pain and other symptoms.
Notes
Huai Hua San has a cold nature, so it is only suitable for short-term use and not for long-term use. It should be used with caution for those with coldness in the middle jiao and blood in the stool. This powder is rarely produced in the modern market and is usually replaced by ready-made medicines such as Sophora japonica pills. When using it clinically, you need to be careful to choose the right medicine.

Although Huai Hua San has a good effect in treating hemorrhoids, it is not suitable for long-term use due to its cold nature . It should be used with caution or avoided for those who have long-term blood in the stool due to qi deficiency or yin deficiency, as well as those with spleen and stomach deficiency. In addition, this powder is rarely produced in the modern market and is usually replaced by ready-made medicines such as Sophora japonica pills. When using it clinically, you need to pay attention to choosing the appropriate medicine.
Conclusion
Huai Hua San is a traditional Chinese medicine prescription with a long history. It has significant effects in treating intestinal diseases and bloody stools by clearing the intestines and stopping bleeding, dispersing wind and promoting qi. However, due to its cold nature, it is not suitable for long-term use and needs to be carefully selected when used clinically. Future research can further explore its pharmacological mechanism, expand its clinical application range, and provide patients with better treatment options.