Artemisia absinthium and Artemisia capillaris are two kinds of traditional Chinese medicines, which are different in their sources, efficacy and effects. 1. Source: Artemisia absinthium is the whole grass of Artemisia grandis, family Asteraceae. Artemisia capillaris is the dried above-ground parts of Artemisia annua and Artemisia capillaris, family Asteraceae. 2. Efficacy: Artemisia can clear away heat and dampness (removing heat and dampness in the body), cool the blood and stop bleeding (making the blood cool and moist, preventing hemorrhage), while Herba Artemisiae can clear away dampness and heat, and relieve jaundice by inducing diuresis (clearing away the evil qi of the biliary tract and eliminating jaundice). 3. Role: Artemisia absinthium is often used in treating wind-cold-dampness paralysis (wind, cold, dampness three kinds of evils invade the body and cause paralysis of limbs), scabies and malignant sores, dampness-heat jaundice, hot diarrhea, and so on. Yin Chen is often used in the treatment of jaundice and urination, dampness and warmth (feeling dampness and heat caused by temperature), summer dampness, wet sores and itching. Contraindications and adverse reactions of Artemisia absinthium are not clear; Adverse reactions of Yin Chen: large amounts can cause nausea, vomiting, transient dizziness, arrhythmia, etc.; Yin Chen should be used with caution in those who have yellowing of the blood and those who have blood deficiency and yellowing. If there is any discomfort, it is recommended to consult a doctor. If medication is needed, it should be diagnosed by a doctor and follow the doctor’s instructions for standardized treatment.