It is a normal condition to stop taking progesterone for 1 day to have menstruation, no special treatment is needed. Usually after 5-10 days of progesterone application, as progesterone is a kind of progesterone, which can make the endometrium to have a secretory reaction on top of the proliferation base, after a certain time of application, the endometrium will have a corresponding shrinkage, so after 2-3 days of discontinuation, sometimes also within 1-2 days there will be corresponding vaginal bleeding. This is a kind of endometrial atrophy therapy and a kind of withdrawal bleeding, which should occur under normal circumstances, so there is no need for special treatment, but if the amount of continuous bleeding is relatively large, further examination is needed if necessary.