Wulingxin is the dried feces of the flying squirrel, Flying Squirrel, which is a medicine for activating blood circulation and removing blood stasis (promoting blood circulation and eliminating blood stasis in the body). It is bitter, salty, sweet, warm in nature and belongs to the liver meridian. It has the effects of activating blood circulation to relieve pain (relieving pain by removing blood stasis) and resolving blood stasis to stop bleeding. As it is good at activating blood circulation and removing blood stasis to relieve pain, it is a key medicine for treating pains caused by blood stasis, and is mainly used for treating pains caused by blood stasis, such as pain in the left chest, pain in the heart, stabbing pain in the gastric cavity and the ribs, menstrual cramps, menorrhagia, amenorrhea, post-partum stasis pain and pains caused by traumatic injuries and bone fractures. Besides, due to its efficacy of removing blood stasis and relieving pain, it can also be used for bleeding with stasis and blood obstruction, such as heavy bleeding during menstruation, purple color and lumpy, stabbing pain in the abdomen and so on. The adverse effects of this drug are not clear. Wu Ling Lipid should not be taken with ginseng, it will reduce the efficacy of ginseng. This product is good at promoting blood circulation, pregnant women and people with blood deficiency without blood stasis (symptoms such as yellowish color, dizziness, insomnia and excessive dreaming, and scanty menstruation, etc.) should be cautious in using this product.