Blood clots mostly belong to the category of “blood stasis”. Leeches have the efficacy of breaking blood circulation and promoting menstruation, expelling blood stasis and eliminating symptoms, and can treat blood clots. Leeches are salty, bitter and flat in nature; they are slightly poisonous. Attributed to the liver meridian. It is used in treating blood stasis, obstruction of menstruation, obstruction in the abdomen, lumps, hemiplegia, fall and injury. For treating menstrual closure and obstruction in the abdomen, it is often used with products that break blood stasis and expel blood stasis, such as peach kernel; for treating bruises and injuries, it can be used with medicines that invigorate blood circulation and heal injuries, such as sumac and natural copper. Leech activates blood circulation and removes blood stasis (promoting blood circulation and eliminating blood stasis in the body), and is contraindicated in pregnant women. Adverse reactions to leeches are not known. Leeches have allergic reactions to individuals, mainly manifested as skin rashes and itching, as well as allergic purpura. If needed, please use under the guidance of a professional Chinese medicine practitioner.