Leeches are used to treat menstrual cramps and impediments (lumps in women’s lower abdomen), but side effects are not yet known. Leech is a traditional Chinese medicine, which has the effect of breaking blood circulation, removing blood stasis and eliminating symptoms, and is useful in treating menstrual closure, obstruction in the abdomen, bruises, abdominal pain, etc. Clinically, leech can be used with frankincense and myrrh to treat bruises and abdominal pain. Clinically, leeches with frankincense and myrrh can be used to treat bruises, stasis, swelling and pain, and leeches with rhubarb can be used to treat internal obstruction of blood stasis, pain in the heart and abdomen, and inability to pass stools. Adverse effects of leeches are not clear, and leeches are not recommended for pregnant women and people with excessive menstruation. If you need to use the drug, you should be guided by a traditional Chinese medicine practitioner under the guidance of the identification of the drug, do not buy your own medicine to use, so as to avoid the drug is not the right evidence, delaying the condition.