Take the contraceptive pill menstruation persistently does not go may be because of the side effects of the pill, or before contraception has been pregnant, but there is a miscarriage, or during the pill combined with disease caused, it is recommended to clarify the cause, change the contraceptive method, such as disease, need to actively treat. Common causes and treatment I. Side effects of birth control pills oral contraceptives are high content of estrogen, progestin or estrogen-progestin combination, after taking it changes the body’s hormone levels, menstrual irregularities, which can be manifested as increased menstruation, amenorrhea, low menstrual flow or dripping menstruation, etc. After the complete metabolism of the pill, menstruation mostly returns to normal within a month. Second, pregnancy after taking part of the pill can lead to miscarriage, there is continuous vaginal bleeding, check the blood HCG value can confirm the diagnosis of pregnancy, generally do not do birth control treatment, feasible abortion to terminate the pregnancy, plus the uterus clearance to prevent infection. Combined diseases 1, endometrial thickening disease: women of childbearing age long-term anovulation, oligoovulation, long-term use of tamoxifen, etc. can cause, can be manifested as abnormal vaginal bleeding, prolonged periods, increased bleeding, non-menstrual bleeding, bleeding period can be treated by scraping, stopping bleeding and taking tissue biopsy, with malignant tendency is recommended for total hysterectomy; 2, uterine fibroids: the cause is unknown, can be related to abnormal hormone metabolism The use of mifepristone and tamoxifen can reduce the size of fibroids and inhibit their growth. Fibroids that are too large or cause severe bleeding or infertility need to be removed surgically or hysterectomized in time. It is best not to take the pill for a long time, as it may cause endocrine disruption, irregular menstruation, amenorrhea, etc. It is recommended to replace other contraceptive measures, such as condoms.