The difference between motherwort and wormwood lies in the part of the medicine, the role and efficacy, taking contraindications and other aspects. 1. The medicinal part: motherwort is fresh or dried above ground, and mugwort is usually dried mugwort leaves. 2. Role and efficacy: motherwort has the effect of activating blood circulation and regulating menstruation (regulating menstruation by activating blood circulation), diuretic and eliminating swelling, clearing heat and removing toxins (removing heat and toxins in the body), and can be used to treat menstrual disorders, dysmenorrhea and menstrual closure, not exhausting the discharge of evil fluid, edema and urination, and sores, ulcers, swelling and poison and other illnesses. The part of the herb that is used as medicine is moxa leaf, which has the effects of warming menstruation and stopping bleeding (warming the human body’s meridians to stop bleeding in the body), dispersing cold and relieving pain (relieving pain by dispelling cold in the body), and dispelling dampness and relieving itching when used externally, and it is usually used in the treatment of vomiting blood, epistaxis, and disintegration of the menstrual cycle (excessive menstruation or more than one drop of menstruation), and other diseases. 3. Contraindications: adverse reactions and contraindications to motherwort are not clear; adverse reactions to mugwort are not clear, and caution should be exercised in cases of yin deficiency and blood heat. The use of the above drugs must be carried out under the guidance of a doctor, not to be used on their own.