Mugwort cannot treat knee pain. The efficacy of mugwort leaves is to warm the menstruation and stop bleeding (warm the human body meridians, stop bleeding in the body), dispersing cold and regulating menstruation (dispersing the cold and regulating menstruation), external use to dispel dampness and relieve itching (dispel dampness and relieve itching). Does not have the role of pain. The Chinese medicine Ai Ye is a perennial herbaceous plant of the family of Asteraceae, Ai Ye leaves. Most areas of China are produced. Harvested in summer, dried and used raw or fried. This product is warm, pungent and bitter. There is a small poison. Attributed to the liver, spleen and kidney meridians. Its effects are to warm the menstruation and stop bleeding (warming the body’s meridians to stop bleeding in the body), dispel cold and regulate menstruation, and dispel dampness and relieve itching when used externally. Mugwort is warm in blood, can warm the blood and warm the meridians, mostly used in the treatment of cold bleeding, clinically can be used to treat the lower element of the cold, Chong Ren is not solid (Chong Ren two veins are weak, affecting the function of fixing) caused by the leakage of blood (menstruation or dripping more than the amount of blood), etc.; can also be used to treat a variety of bleeding caused by blood heat paranoia (heat evil caused by the blood to abnormalities out of the blood); but also can be used to treat cold pain in the abdomen (abdomen), cold uterus, such as infertility. Adverse reactions and contraindications are not clear, the above drugs need to be used under the guidance of a doctor.