During menstruation, if the vagina discharges tissue that looks like rotten meat, it is often due to the following reasons. The first is because menstrual blood contains not only blood, but also fragments of endometrium and cervical mucus. In most cases, the endometrial fragments cannot be seen without careful examination, but when the endometrium is shed in pieces, it will be manifested as a rotten tissue in the menstrual blood, which is often preceded by pain in the lower abdomen before the tissue is eliminated. Clinically, this condition is called membranous menstruation. The second is the vaginal discharge of ropy tissue due to miscarriage. Because just to the menstrual period when the vaginal bleeding, mistaken for menstruation, but in fact, the pregnancy is the occurrence of the first sign of miscarriage, due to the lack of timely treatment, will be transformed into a complete miscarriage, and the products of pregnancy excluded from the body, which led to the rotten meat-like tissue material. Therefore, when the vagina discharges the tissue like rotten meat, it is recommended to send the tissue to the hospital to the doctor for visual observation, and send the pathology test, according to the results and then give the appropriate treatment.