Dark-colored menstruation with low menstrual flow can be broadly divided into physiological and pathological causes, which should be effectively treated, mainly including medication and surgery. 1. Non-pathological causes and corresponding treatment: (1) Side effect of placing intrauterine device: it manifests as a small amount of spotting bleeding. Generally, no special treatment is needed, and it can return to normal after 3 to 6 months, and observation is enough. (2) Endocrine disorders: Commonly caused by mental tension, stress, late night, unhealthy diet, etc., the hormone level in the body is affected, resulting in small amount of menstruation and dark color. Improvement of lifestyle and adjustment of mindset can gradually alleviate the problem. 2. Pathologic causes and corresponding treatment: (1) Decrease in hormone level: commonly seen in luteal insufficiency, hypothyroidism, etc., which may lead to a decrease in estrogen and progesterone, affecting the growth of the uterine lining, and ultimately leading to symptoms such as scanty menstrual flow and dark color. Oral progesterone, thyroxine tablets and other symptomatic treatment can be taken, the specific medication should be used under the guidance of a doctor. (2) After invasive operation in the uterine cavity: after abortion and curettage, the above invasive operation will easily damage the endometrial basal layer, which may lead to adhesion in the uterine cavity, resulting in scanty menstrual flow. Gynecological examination and gynecological ultrasound should be carried out, and hysteroscopic adhesion release surgery should be performed if necessary. In daily life, it is necessary to maintain a good attitude, ensure a regular routine, and develop good hygiene habits. If low menstrual flow is accompanied by other uncomfortable symptoms, it is recommended to go to the hospital to identify the cause of the disease and carry out standardized treatment under the guidance of the doctor.