If menorrhagia occurs after weight loss, it is recommended to enhance nutrition and regain weight, such as eating more high-protein and high-vitamin foods, eating small and frequent meals, minimizing exercise or stopping strenuous exercise, and regaining about 85% of the standard weight, most of them will resume normal menstruation on their own. If menstruation does not resume even if 85% of the standard weight is regained, you can promote the onset of menstruation by taking progesterone capsules by mouth or injecting progesterone injection intramuscularly. If you still do not get your period normally, you can take supplemental Glaxo and progesterone to establish an artificial cycle to promote the onset of menstruation.