The efficacy of Artemisia annua is mainly to dispel wind and dampness (dispel wind and dampness in the body), blood circulation and relieve pain (relieve pain by removing blood stasis), and can be used to treat rheumatism and bone pain, bruises, limb pain and so on. Artemisia annua, is the dried tuberous root of short-stalked aconite, iron stick hammer or Xuanwei aconite of buttercup family, etc. It is bitter and pungent in taste, warm in nature, with great toxicity, and has the efficacy of dispelling wind and dampness (dispelling wind and dampness in the body), activating blood circulation and relieving pain (relieving pain by dispelling blood stasis). This herb is mainly used for treating rheumatism and bone pain, bruises, limb pain, toothache, sores, carbuncles, swollen poisons and cancer pain. It is highly toxic and should be taken under medical supervision. It is forbidden to be taken by pregnant women, patients with heart disease, ulcer disease and children. At present, the specific medication about Artemisia annua on snow, should be under the guidance of a specialist physician, not unauthorized use of medication, in order to avoid adverse reactions.