Pre-menopausal menstrual manifestations may be abnormal, mainly in the form of menstrual disorders such as irregular menstrual cycles, irregular menstrual periods, and irregular menstrual flow. The fluctuation of sex hormones before menopause may cause a series of changes, such as menstrual abnormalities, vasodilatation, symptoms of autonomic dysregulation and psychiatric symptoms. Among them, menstrual abnormality manifests as menstrual disorders, irregular menstrual cycles, menstrual periods of different lengths, and an increase or decrease in the volume of menstrual flow. It may be accompanied by hot flashes, palpitations, dizziness, insomnia, mood swings, and memory loss. Pre-menopausal menstrual abnormalities are mostly physiological, and it is important to exercise, maintain a happy mood and eat a reasonable diet. If menstrual disorders are accompanied by abdominal pain, abdominal masses and other symptoms, it is necessary to go to the hospital in a timely manner.