If there is dirt in the menstrual blood, it may be due to the following clinical reasons, the first one is that there is a Candida infection in the vagina. Because Candida infection will often be formed in the vagina tofu scum like secretion, when the menstrual blood will be this tofu scum like secretion flushed out of the vagina outside, in the menstrual blood will be seen in a kind of similar to the clots of the things discharged, this situation is often clinically accompanied by vulvar itching, it is recommended that oral fluconazole for treatment. The second reason is caused by the membrane-like menstruation, due to menstruation is the endometrium shedding caused by vaginal bleeding, when the endometrium shedding is relatively large, will see the endometrium in the menstrual blood, clinically similar to the rotting meat like tissue, this situation in the clinic the patient does not have any symptom, if there is a pain in the lower abdomen, you can take oral blood to expel blood stasis capsule for treatment.