[Nature and flavor and meridians] Spicy and bitter in taste, slightly warm in nature. Enters the kidney and bladder meridians.
 【Effects】Dispel wind and dampness, relieve numbness and relieve pain.
 [Indications] Wind-cold-dampness arthralgia, pain in the waist and knees, Shaoyin hidden wind headache, wind-cold-dampness headache.
 [Contraindications] People with yin deficiency and blood dryness should take it with caution. People with qi and blood deficiency and general body pain, as well as yin deficiency and lower body weakness should not take it. Among all the types of deficiency and wind, Duhuo is not suitable.
 【Medical records】
 "Ben Jing": "It is used to treat wind-cold attacks, relieve pain from wounds, runaway pig, epilepsy, and hernia in women."
 "Bie Lu": "It can cure all kinds of wind, including gout in all joints, and no one who has been sick for a long time has just had it."
 "Medicine Properties": "It is used to treat rheumatism, coldness, shortness of breath, itching of the skin and muscles, cramps in the hands and feet, strain, and toothache caused by wind poison."
 "Medical Origin": "The secret of main treatment says: It can dry out dampness, and can cure dizziness and vertigo."
 Zhang Yuansu: "Disperse carbuncle and blood."
 Li Gao: "It can treat wind-cold-dampness arthralgia, soreness and numbness, dizziness and difficulty in stretching the head and neck."
 Wang Haogu: "It removes wind evil from the kidneys, searches for liver wind, drains liver qi, and treats stiff neck, back pain, and back pain."
 "Southern Yunnan Materia Medica": "It can treat cold pain in the flanks and face and can also treat sweating."
 "Compendium of Materia Medica": "It can treat loss of voice, paralysis of hands and feet, crooked mouth and eyes, red eyes and itchy skin."
 "Compendium of Materia Medica": "It can treat rheumatism in the lower part of the body, pain and numbness in the feet, and itching and cramps."
 【Predecessors release medicine】
 "Tangye Bencao": "Duhuo treats the hidden wind in the Shaoyin meridian of the foot, but not the Taiyang meridian. Therefore, the cold and dampness in the feet, the inability to move or stop, cannot be cured without this medicine."
 "Compendium of Materia Medica": "Duhuo is used to relieve pain in wounds caused by wind and cold. Wounds caused by wind and cold will cause blood and qi to stagnate and not flow, so the pain will be more severe. Duhuo is bitter, sweet, pungent and warm, which can repel wind and cold. When the evil is dispersed, the skin will be at peace, and the qi and blood will circulate, so the pain will stop. Running pig is a kidney accumulation. When the kidney meridian is invaded by wind and cold, it will become running pig. This medicine originally enters the foot Shaoyin, so it can treat running pig. Epilepsy and recovery are both caused by wind evil. When the wind is gone, epilepsy and fever will heal by themselves. Hernia in women is caused by cold and dampness taking advantage of the kidney. Bitterness can dry dampness, warmth can repel cold, and pungent can disperse. When cold and dampness are gone, the kidneys will be at peace. Therefore, it is used to treat hernia in women, and treats all kinds of thieves' wind and gout in hundreds of joints.
 "Compendium of Materia Medica" says: "Duhuo is good at promoting blood circulation, dispelling wind, dampness and cold. All symptoms of wind disease, such as the inability to bend and stretch the head and neck, the inability to bend and stretch the waist and knees, or the pain and difficulty walking, numbness and inability to use, are all caused by wind and cold, and the damage caused by heat and dampness. Duhuo's bitter and pungent and warm properties must be used to activate qi and blood and dispel cold evil. Therefore, "Compendium of Materia Medica" says that it can dispel beriberi, resolve running pig, treat hernia, eliminate carbuncle, treat wind attack pain in all joints, and calm the cold depression headache of Shaoyin. This is the meaning."
 "Pharmaceutical Chemistry": "Duhuo can open up the airways from the top of the head to the knees to disperse the hidden wind in the kidney meridian. It can cure the neck, hip and leg pain, and paralysis of the two feet. It can cure wind, which overcomes dampness. It is a good medicine for dispersing dampness. It can also assist blood-activating drugs to promote blood circulation and relax muscles. It is very miraculous."
 "Compendium of Materia Medica Seeking Truth": "Duhuo, bitter and slightly warm, is slightly slower than Qianghuo. If the wind dries up the Shaoyin kidney meridian of the foot, it will not come out and cause headaches. It can be searched and treated well. Therefore, it can cure dampness and numbness in both feet and inability to move. It can also cure toothache caused by wind poison, dizziness and vertigo... It is controlled by what it wins. Moreover, there must be dampness when there is wind, so Qianghuo treats water dampness and wandering wind, while Duhuo treats water dampness and hidden wind. Qianghuo's qi is clear, it promotes qi and disperses the evil of the Yingwei, while Duhuo's qi is turbid, it promotes blood circulation and warms the Yingwei qi. Qianghuo has the function of releasing the exterior, while Duhuo has the power of helping the exterior. Qianghuo moves to the upper part of the body and regulates it, so wandering wind headaches and rheumatic joint pain can be cured. Duhuo moves to the lower part of the body and regulates it, so hidden wind headaches and dampness and numbness in both feet can be cured. Although the two live are wind treatments, they are used differently and must be carefully examined."
 "Compendium of Materia Medica" states: "Duhuo is the main medicine for dispelling wind and unblocking meridians. "Benjing" states that it is used to treat wind-cold attacks, and it is the correct treatment for dispelling wind. It is used to relieve pain from wounds, which refers to tetanus caused by external wind evil. It can treat the pain caused by wind, but it cannot treat the pain caused by blood loss and fever. Running pig is originally caused by the evil of kidney water rising up, and warm and spicy medicine can reach down, so it can also treat it. Epilepsy and convulsions are also caused by wind movement, but Duhuo is suitable for cold wind, but it is not suitable for phlegm and fire to generate wind. "Bielu" treats thief wind and gout in all joints No matter how old it is, its fragrance spreads everywhere, and it is also inferior to windproof. The fragrance of Duhuo is strong and overflowing, so it can dredge all meridians, harmonize the meridians, open the tendons and bones, and benefit the organs. If the cold and dampness evil numbness in the muscles and joints is not used, it cannot reach the meridians and joints directly. Therefore, it is an indispensable medicine for wind-induced paralysis and weakness. However, in ancient times, Qianghuo and Duhuo were not distinguished, so ancient books used Duhuo to treat both internal and external diseases. All symptoms of the head, face and limbs are covered by Duhuo. Since the Song Dynasty, Qianghuo has been a separate herb, and its aromatic aroma is particularly strong, so it goes all over the body, which makes Qianghuo the superior one. Duhuo has a stronger flavor, so it is used to treat symptoms of the waist, knees, feet and shins. Although the ancients did not say it clearly, Hai Zang said that Qianghuo has a strong aroma and Duhuo has a thin aroma. Shi Wan also said that it has both ascending and descending properties, and both have a hidden difference between the upper and lower parts. The family method of Yiye's teacher Zhu always uses Duhuo to treat the lower part. From the waist to the lower abdomen, Duhuo is commonly used. It can not only cure paralysis, numbness, soreness and pain caused by wind, cold and dampness, but also cure ulcers in the yin part, which are easy to cure before ulceration and easy to heal after ulceration. Its effect is obvious and credible. This is the profound meaning that the ancients never clearly stated. ... However, if the princes are paralyzed and lame, they are mostly due to deficiency of qi and blood and cold, which cannot flow freely. If it is not for the pungent and dispersing effect of Qiangdu, it will not be effective quickly. Although the root cause of the disease is blood deficiency, it is also suitable to nourish blood and fluid, and participate in promoting collaterals and warming circulation, and gradually achieve results. "