Is having an irregular menstrual cycle dangerous?

If you’re young and not trying to conceive it’s not dangerous in the short term. Very irregular periods, especially less than four periods a year, over a long period of time (many years) can increase the risk of a type of uterine cancer (endometrial cancer). If you have acne or unwanted hair growth you should get tested for Polycystic Ovarian Syndrome (PCOS) which can cause an increased risk of diabetes. Birth control pills regulate your periods if you’re not trying to conceive, but it’s good to have a diagnosis before going on the pills. Whether or not you’re trying to conceive, you can see a Reproductive Endocrinology and Infertility (REI) MD for testing, and for treatment if needed