Artemisia absinthium is not chen, they are two different Chinese herbs, the parts of the medicine and the role and efficacy are not the same. Artemisia annua is the whole grass of Artemisia annua, family Asteraceae, taste bitter, slightly sweet, cool, have the effect of clearing away heat and dampness, cool the blood and stop bleeding, mainly used for sore throat, wind-cold dampness paralysis, jaundice, vomiting blood, hemoptysis, bleeding from wounds, hot diarrhea, scabies and malignant sores and other illnesses. Yin Chen is the dried aboveground part of Artemisia or Artemisia capillaris, family Asteraceae, with bitter, pungent flavor and slightly cold nature. It has the effect of clearing dampness and heat, relieving bile and jaundice (dredging the biliary tract of evil qi and eliminating jaundice). It can be used in jaundice and urination, dampness and warmth (warmth caused by feeling dampness and heat), summer dampness, wet sores, itching and other symptoms. The two are not the same kind of herb, when used as Chinese herbs, the part of the medicine and the effect and efficacy are not the same, pay attention to identify. It has not been clarified its contraindications and adverse reactions, but the drug is prohibited for people who are allergic to the drug, the use of medicinal herbs must follow the doctor’s instructions.