Combining with Cinnamon, Ox Knee can induce fire to return to the source (inhibiting the rising of fire evil in the kidneys), relieve pain and clear the menstruation. Ox Knee can expel blood stasis and promote menstruation (removing blood stasis and dredging the meridians), tonify the liver and kidney, strengthen the tendons and bones, promote diuresis and gonorrhea (improving the problem of dribbling in urine and the problem of small amount of urine not being passed), and induce the blood to flow downward. It is used for menorrhagia, dysmenorrhea, lumbar and knee pain, weakness of muscles and bones, gonorrhea (increased frequency of urination, astringent pain in urination), edema, headache, vertigo, toothache, mouth sores, vomiting blood, epistaxis. Cinnamon can replenish fire and yang (replenish yang qi in the body), induce fire to return to the vital energy, disperse cold and relieve pain (relieve pain by removing cold from the body), and warm the meridians. It is used in treating impotence, coldness in the uterus, cold pain in the waist and knees, asthma due to kidney deficiency, deficiency of yang (relative deficiency of yang affecting the head and face), dizziness, cold pain in the heart and abdomen (cold pain in the heart and abdomen), cold vomiting and diarrhea, dysmenorrhea, menstrual cramps and menstrual closure, and so on. Combining with cinnamon has the effect of tonifying kidney yang, clearing menstruation, guiding rebellious blood downward as well as inducing deficiency fire to the kidney, etc. It is used for treating dysmenorrhea, menstrual occlusion, vertigo, cold pain in the waist and knees, and vomiting of blood, etc. It is also used for treating the pain of menstrual occlusion. It should be used under the guidance of a doctor.