How long to take Ermiao San can be effective, mainly by the patient’s condition and the patient’s physical tolerance, symptomatic treatment can receive good results. In addition, the adverse reactions, contraindications and precautions of Ermiao San are still uncertain. If you need to use the medicine, you should use it under the guidance of a Chinese medicine practitioner and should not use the medicine on your own to avoid adverse effects on the body. Ermiao San belongs to a kind of traditional Chinese medicine prescription, composed of cypress and cangzhu, which has the effect of clearing heat and drying dampness. Its function is to treat the tendon and bone pain caused by dampness-heat injection, or impotence and weakness of both feet, or redness, swelling and pain of the feet and knees, or dampness-heat under the belt, or wet sores in the lower part of the body, short and red urination (urine is small in quantity and dark yellow in color), and yellowish and greasy tongue coating, etc..