Increased menstrual flow after taking progesterone tablets is usually due to withdrawal bleeding after the initial oral intake of the drug. In some women, the endometrium is thicker than before, and after taking progesterone tablets orally, the endometrium peels off, causing increased menstrual flow, which usually does not require special treatment and will slowly decrease afterwards. If you continue to take progesterone tablets for cycle treatment afterwards, it can inhibit the endometrial proliferation of women and prevent the occurrence of endometrial thickening, which will gradually restore normal menstruation or even cause a decrease in menstrual flow. In case of treatment of dysfunctional uterine bleeding, the condition is more severe and the role played by progesterone is weaker, there will also be an increase in menstrual flow after taking progesterone tablets. If the patient is combined with submucosal fibroids, endometrial polyps, endometrial cancer or cervical cancer, increased menstruation may also occur after taking progesterone. If the menstrual flow is always heavy and does not show any decrease, you need to visit the hospital promptly. It is recommended to have a venous blood test for sex hormone six to find out if the excessive menstrual flow is due to endocrine level disorder. Ultrasound examination is also recommended to further understand whether the excessive menstrual flow is caused by lesions in the endometrium, and if necessary, a diagnostic scraping test can be chosen. Drugs need to be used under the guidance of a professional doctor to reduce vaginal bleeding. If lesions such as fibroids, polyps or tumors are present, surgical treatment is feasible if the diagnosis meets the indications for surgery. It should be noted that clinically, progesterone tablets are mainly used to adjust menstruation and protect fetus, and the more commonly used ones are medroxyprogesterone acetate tablets and detroxyprogesterone, which belong to the progestin class of drugs and can be taken in moderation by patients with menstrual irregularities. However, no matter which progesterone tablets are used, they should be used under the guidance of a doctor, and after taking them, attention should be paid to the observation of progesterone levels and timely adjustment of medication.