If you do not bleed when you have your period, which means that the amount of menstruation is low, then it is recommended to find out the cause of the low amount of menstruation. If you have a history of sexual intercourse, you should first rule out the possibility of pregnancy by taking a blood test for HCG, or a morning urine test for HCG to find out if you are pregnant, and then decide on the next step based on the results. In addition, it is important to find out if you have premature ovarian failure, pelvic tuberculosis or polycystic ovary syndrome, or endocrine disorders such as hyperandrogenism or hyperprolactinemia, which may cause a significant decrease in menstrual flow. Only when the cause is clearly identified can appropriate treatment be given to improve the symptoms of this menstrual flow.