There is a fishy odor when you have your period, mainly because the blood itself has a fishy odor, so it can cause this situation. In addition, it is also important to understand the physiological status of menstruation, such as what is the amount of menstrual flow, between 35-58mL, if it is greater than 80mL, it is an abnormal phenomenon. Menstrual blood is dark red in color, and there should not be any blood clots among the menstrual blood because menstrual blood itself is non-clotting. If you find blood clots in your menstrual blood, increased menstrual flow, or a strong odor in your menstrual blood, these are all pathological phenomena and further examination should be done. For example, if your menstrual blood has a strong fishy odor, it may be caused by bacterial vaginosis, or it may be due to cancer of the endometrium, so it is recommended that you go to the hospital to have further examination, and based on the results of the examination, you need to intervene.