Blood clots in the menstrual period after abortion may be normal menstruation, or may be caused by uterine cavity residues, combined coagulation diseases, gynecological diseases, which need to be identified as soon as possible and treated in a timely manner. Common causes and treatment 1. Normal menstruation: Generally, menstruation will occur about 1 month after abortion, because the endometrium has been damaged, which may lead to a larger amount of bleeding and the formation of clots, generally do not require special treatment, uneasy or continuous bleeding, increased bleeding can be consulted, gynecological examination, taking motherwort granules to regulate or hysteroscopy to stop bleeding; 2. This situation can be diagnosed under vaginal ultrasound, and treatment of uterine bleeding and hemostasis can be performed. 3. abnormal coagulation function: such as vitamin K deficiency can cause insufficient synthesis of coagulation factors, resulting in increased bleeding, aggravated menstrual bleeding and clots, often accompanied by prolonged clotting time and purple skin spots after bleeding from other parts. The symptoms can be slowed down by supplementation of vitamin K. 4. Other: Patients with combined adenomyosis may have increased menstrual flow for several months and may have symptoms before abortion, and may have dysmenorrhea, which is progressively worse and may radiate to the perineum. Aspirin may be used to relieve dysmenorrhea, usually with focal resection, endometrial resection or total hysterectomy. Other diseases such as uterine fibroids and endometritis can also occur. Gynecological examination should be performed when accompanying symptoms appear in order to treat them and restore health as soon as possible. The vaginal bleeding may occur within a few days after abortion, mostly due to vascular damage, shed endometrium and a small amount of residual embryo, which usually disappears in 7-10 days, and normal menstruation may occur in about 2 months.