If you have a prolonged period with abnormal menstrual flow, you should go to the hospital for a detailed examination, including a standard gynaecological examination, routine blood tests, reproductive endocrine hormones, thyroid function tests and ultrasound, to make a professional judgement. If it is caused by the placement of the IUD (intrauterine device) or the use of sex hormone drugs, etc., the doctor should determine whether the IUD should be removed or the drugs should be stopped on a case-by-case basis.