[Nature and flavor] Slightly bitter, slightly cold.
 [return through meridians]Return the liver, gallbladder and lung meridians.
 [Effects] It can promote dampness and reduce jaundice, clear away heat and detoxify, disperse blood stasis and relieve pain, and relieve cough and resolve phlegm.
 [Indications] It is used for damp-heat jaundice, stranguria, leucorrhea, rheumatic pain, carbuncle, ulcer, burns, amenorrhea, abdominal mass, sprain, and cough due to lung heat.
 【Medical records】
 "Ming Yi Bie Lu" is mainly used to promote menstrual flow and resolve blood retention.
 "Materia Medica": Treats severe fever and irritability, quenches thirst, promotes urination, and suppresses all heat toxins.
 "Supplement to Materia Medica": It is used to treat wind in the joints and blood stasis. Boil the juice and make wine for drinking.
 "Rihuazi Materia Medica": Treats postpartum blood retention, abdominal distension, pus discharge, sores, carbuncle poison, women's blood fainting, blood stasis, wind poison and qi stagnation.
 "Southern Yunnan Materia Medica": It can attack all kinds of swelling and poison, stop throat pain, promote urination, and move the meridians. It can treat stranguria, hemorrhoids, sores, carbuncle, and leucorrhea in women.
 "Yi Lin Zong Yao" says: It strengthens the kidneys, strengthens yang and improves essence, strengthens tendons and bones, and increases strength. Applying it to injured or broken parts can heal tendons and bones.
 【Predecessors release medicine】
 "Compendium of Materia Medica": The main treatment of Polygonum cuspidatum is similar to that of Tianmingjing in promoting blood circulation, and similar to that of Vaccariae glutinosae in treating wind. However, many ancient philosophers said that it is the best for relieving summer heat poison. This is to remove heat from the origin of blood production, so the blood organ of the hand Jueyin meridian and the wind organ of the foot Jueyin meridian are treated like drums responding to drumsticks. Prescription books use it to treat spasms, and it is the same as other heat-clearing medicines, because its function is very important. However, it is rarely used for other symptoms. Why? Prescription books use it to treat stranguria, that is, Danxi used it as an important medicine to treat stranguria caused by the injury of qi and blood in the elderly, and used it in tonics. It is said that it is harmful to weak people to take it, and it is used together with tonics, which is almost the same.
 "Benshi Fang": The root of the bitter stick is commonly called Du Niu Xi. Take a lot of it, wash it, and crush it. Take one cup of it, add five cups of water, and boil it into one cup. Remove the residue. Use a little musk and frankincense, grind it and mix it, and treat all kinds of stranguria in women. Geng Mengde, the military commander of Yin County, had a wife who had suffered from stranguria caused by sand and stones for thirteen years. Every time she swirled, the pain was unbearable. When she urinated in the urinal, there were sand and stones, and there was a sound of peeling. Nothing worked. She happened to get this recipe and sipped it. She was cured overnight. I saw it with my own eyes.