Since abortion can cause some damage to the endometrium, resulting in a thin endometrium, the amount of menstrual blood will be less than before, and it can usually recover slowly. However, if the menstrual flow is particularly low, it is mostly abnormal and may be caused by uterine adhesions and cervical adhesions. Patients are recommended to seek medical advice for sex hormone tests, hysteroscopy and other tests to confirm the diagnosis and treatment. 1. thin endometrium: medication can be used to promote endometrial growth, as well as physical therapy such as electrical stimulation and other treatments such as stem cell therapy and growth factors. 2. cervical adhesions: the preferred treatment is adhesion separation. Surgery, postoperative antibiotics can be used as prescribed to prevent infection as well as re-adhesion, and estrogen drugs can be applied to promote endometrial proliferation and repair, and small doses of non-steroidal anti-inflammatory drugs such as aspirin can increase the blood supply to the uterus and endometrial thickness, which is beneficial to the recovery of the uterine cavity and the improvement of menstruation. In addition, other drugs, such as gonadotropin-releasing hormone and growth hormone, can be applied under the guidance of doctors.