The small amount of fresh blood every day after menstruation may be caused by pregnancy factors, endocrine disorders, cervical and uterine pathologies, etc., which need to be analyzed specifically. 1. Pregnancy factor: for non-menopausal women with irregular menstruation, abnormal bleeding caused by pregnancy factor should be ruled out first. Pre-eclampsia or ectopic pregnancy may cause abnormal bleeding. 2. Endocrine disorders: abnormal ovulation leads to prolonged estrogen stimulation, which causes the endometrium to proliferate and thicken to a certain extent, and the endometrium will shed irregularly, resulting in unclean and increased menstrual bleeding and prolonged menstrual period; if there is an abnormality in luteal function, the menstrual period will be unclean with a small amount of fresh blood every day. 3. Cervical and uterine lesions: Organic lesions of the cervix and uterus such as cervical polyps, pre-cancerous and cancerous lesions of the cervix and uterine fibroids can lead to irregular bleeding; endometrial lesions such as atypical hyperplasia of the uterine lining, pre-cancerous lesions, cancerous lesions of the uterine lining, and other pathological diseases can also lead to irregular bleeding from the vagina, which is also accompanied with an increase in the amount of menstrual flow in a few cases. There are other possibilities of having a small amount of fresh blood every day when menstruation is not always clean, and the patient can go to a regular hospital for medical treatment under the guidance of a doctor.