Cang Er Cao is pungent, slightly cold, and belongs to the lung meridian. It has the effect of dispersing wind and removing dampness, detoxifying and killing insects. It can treat joint pain caused by wind-cold and dampness invasion, and can be combined with Tempeh, as well as with Gentiana and Sericea. For itchy skin caused by external wind, Cang Er Cao can be combined with Bai Xian Pi and Tribulus Terrestris, or used alone to boil water for external washing, and Cang Er Cao can be grinded to treat scabies and leprosy. Modern research has found that Cang Er Cao can treat chronic rhinitis and can be used with Xin Yi. For functional uterine bleeding, Cang Er Cao can be used with Sheng Di or Peony Bark, Cang Er Cao can also dilate blood vessels and has certain hypotensive effects. This product disperses qi and consumes blood, where weakness, spleen and stomach weakness, dizziness and tinnitus should be used with caution, Cang Er Cao is more toxic and is not recommended to be taken continuously.