At present, the Chinese herb that is clearly indicated to induce the downward movement of medicines (directing the effects of medicines to the lower part of the body) is hyssop. Ox Knee has the effect of tonifying the liver and kidney, strengthening the muscles and bones, and inducing the blood to move downward (promoting the blood to run downward). Ox Knee is flat in nature, sweet, bitter and sour in flavor, and belongs to the liver and kidney meridians. It is effective in removing blood stasis and clearing the meridians, tonifying the liver and kidneys, strengthening the muscles and bones, inducing diuresis and diaphoresis (improving the problem of dribbling in urine and the problem of insufficient volume and inaccessibility of urine), and inducing the downward flow of blood. Ox Knee is used in treating bruises, stagnant pain in the waist and knees, dysmenorrhea with blood stasis, soreness in the waist and knees, and weakness of muscles and bones. Ox Knee can lead all kinds of drugs downward, for clinical treatment of diseases below the waist and knees commonly used to induce menstruation. The adverse effects and contraindications of Niujia are not clear, and pregnant women and menstruating women should be cautious of using the drug. If you need to use the medicine, you should consult your doctor first and use it under the doctor’s guidance.