The main effects of Rheum palmatum are diuresis, clearing heat and fire, cooling blood and removing toxins, expelling blood stasis and clearing menstruation, inducing diuresis and eliminating yellowing. Contraindications are for the weak or weak qi and blood, as well as the spleen and stomach cold people should be prohibited from using, as well as pregnant women and lactating women are prohibited. 1. Efficacy and effect: rhubarb has the effect of diarrhea, clearing heat and fire, cooling the blood and detoxification, usually use rhubarb to treat constipation caused by dampness-heat, and can also relieve the symptoms of vomiting of blood due to heat and blood and produced by the leakage of blood, (excessive menstruation or more than a few drops) and so on. Raw rhubarb powder has the effect of removing blood stasis and clearing menstruation, and can be used for irregular menstruation, dysmenorrhea and menstrual closure caused by blood stasis. It can also promote dampness and eliminate yellowish color, and can be used for jaundice and redness of urine. 2. Contraindication: It should not be taken if the patient has symptoms of weak qi and blood as well as cold spleen and stomach. Because rhubarb has the effect of cooling the blood, these patients by using rhubarb may cause aggravation of the condition. And pregnant women belong to a special body, after using the drug may affect the normal development and growth of the fetus in the abdomen. Raw rhubarb powder needs to be used under the guidance of a physician to avoid adverse consequences.