【Nature and flavor】Pungent, bitter, cold.
 [return through meridians] Returns to the liver and gallbladder meridians.
 [Effects] Clears the liver and reduces fire, improves eyesight, disperses lumps and reduces swelling.
 [Indications] Used for red and swollen eyes, night pain in the eyeballs, headache and dizziness, scrofula, goiter, breast abscess, breast lumps, and breast pain.
 【Usage and Dosage】9-15g.
 [Precautions] Use with caution if the spleen and stomach are weak.
 【Features】A "holy medicine" for clearing and protecting the liver.
 【Medical records】
 "Ben Jing": "It is used to treat cold and heat, scrofula, fistula, head sores, ulcers, goiter, qi stagnation, and swelling and dampness of the feet."
 "Compendium of Materia Medica": "Nourishes the blood vessels."
 "Southern Yunnan Materia Medica": "It can dispel liver wind, promote the circulation of meridians, and treat crooked mouth and eyes. It can promote the circulation of liver qi, relieve liver depression, stop pain in tendons and bones, eyeball pain, and disperse scrofula and tuberculosis throughout the body."
 "Essentials of Herbal Medicine" states: "It can remove phlegm and pus, treat scrofula, clear the upper part and replenish the lower part, remove eye membranes, and relieve pain."
 "Compendium of Materia Medica": "It can treat scrofula, fistula, goiter, hard masses, mastitis and breast cancer."
 【Predecessors release medicine】
 "Compendium of Materia Medica": "Li Jushi's "Easy and Simple Prescriptions" says that Prunella vulgaris can be used to treat eye pain. Soak it in sugar water overnight and use it because it can relieve internal heat and relieve liver fire. Lou Quanshan said that Prunella vulgaris is effective in treating eye pain that is worse at night, or when bitter and cold medicines are used to treat it, it is also effective. The eyeball is connected to the eye root, which is related to the liver and belongs to the Jueyin meridian. If the pain is worse at night and bitter and cold medicines are used to treat it, it is because night and cold are also yin. Prunella vulgaris has pure yang energy and replenishes the Jueyin blood vessels, so it is effective in treating this condition, using yang to treat yin."
 "Compendium of Materia Medica" states: "Prunella Vulgaris nourishes the blood vessels of the Jueyin meridian and can also dredge qi stagnation. Eye pain and scrofula are both liver diseases, so it has a miraculous effect. However, long-term use may also damage the stomach. It should be taken with ginseng and astragalus to ensure long-term use without any harm."
 "Compendium of Materia Medica" states: "Prunella vulgaris is bitter, pungent and slightly cold. According to the book, it is said to dissipate stagnation and relieve heat, and can cure all scrofula, dampness and arthralgia, night pain in the eyes, etc., which seems to be able to clear heat with cold. But the book also says that the Qi is pure Yang and it can replenish liver blood. Isn't it contradictory? How can we know that although the Qi is cold, the taste is pungent, and all stagnation will be dispersed if it is pungent. Although the Qi is cold, it is still warm, so it is said to be able to replenish blood. Therefore, all symptoms such as heat stagnation in the liver meridian can be cured by this treatment, because it can be used to dissipate. If it is caused by internal fire, it is not suitable for treatment."
 Chongqing Hall Essays: "Prunella Vulgaris is slightly pungent and sweet, so it has the function of dispersing nodules and nourishing yin. People who suffer from insomnia after blood loss can sleep right away after taking it, which shows its nature. The older the herb, the sweeter it tastes, making it a better herb."
 "Compendium of Materia Medica" states: "The nature of Prunella Vulgaris is bitter and pungent in the original Ben Jing, without the word "cold", which can be verified by Sun's Wen Jing Tang edition. Since Qian Jin, the word "cold" has been added under the word "pungent", but this grass withers at the summer solstice, so it got this name. Danxi said that it has pure yang energy, and it will die if it gets yin energy. It is good at treating scrofula, breaking up tumors and dispersing knots, and swelling and dampness of the feet, and it is good at dispersing and purging. It must have a mild energy to dissipate the hardness and stagnation, and it should not have a cold effect. Shi Wan's "Feng Yuan" changed it to bitter, pungent and warm, which has its own truth. Bitterness can be purged, pungent can be purged, and warmth can be circulated. It is good at purging the stagnation of liver and gallbladder wood and fire, and smooth the circulation of qi and blood. It is specialized in treating all phlegm and qi stagnation, wind and cold arthritis."