Women’s menstruation appears lumpy mostly because of the following reasons: Firstly, because the menstrual blood is too much and discharged too fast, resulting in the menstrual blood clots. Secondly, because of emotional depression, nervousness, anxiety, etc. lead to the poor operation of qi and blood stasis into clots. Then, the menstrual blood becomes clotted because of eating too much cold food during menstruation or getting cold in the abdomen leading to uterine cold. Then, if a woman has endometrial polyps or uterine fibroids and other diseases, it can also lead to increased menstrual blood flow with the symptom of blood clots. Finally, menstrual blood can become clotted if there are abnormalities in the coagulation function or platelet count. Therefore, a small amount of blood clots during menstruation does not require special treatment, but if more clots occur and continue throughout the menstrual period, it is important to pay attention to it and consult a specialist as soon as possible to identify the cause and treat the symptoms.