The reasons for dark color and low volume of menstruation are manifold. Firstly, gynecological diseases such as vaginitis, cervicitis and endometritis can cause dark color and low volume of menstruation. Secondly, patients who have a history of uterine manipulation, such as abortion, diagnostic curettage, hysteroscopy, hysterectomy, etc., can cause thinning of the endometrium leading to adhesions in the uterine cavity, adhesions in the cervical canal, which can lead to dark and scanty menstruation. Endocrine disorders, such as low secretion of estrogen level, anemia, deficiency of blood and qi, deficiency of qi, and deficiency of blood, can also lead to dark and scanty menstruation. It is recommended to do further examination and treatment for the disease, usually ensure enough sleep, pay attention to personal hygiene, avoid catching cold, eat more fresh vegetables and fruits, supplement vitamins and minerals, and strengthen nutrition.