When most of us complain about our periods, we kvetch about those heavy flow days and the bloating, cramping, and exhaustion that can go along with them. So if your period suddenly becomes very light the whole time, it might seem like a good thing. While less bleeding may very well make you more comfortable, it could be a sign something’s gone awry. (An unusually heavy period can also be cause for concern.)
FYI, the scientific term for abnormally low bleeding is hypomenorrhea. While most periods produce between 30 to 50 mL, a person with hypomenorrhea is producing substantially less than 30 mL per cycle, according to the book Clinical Methods: The History, Physical, and Laboratory Examinations. It’s pretty difficult to measure out your period in mL, but this is just a point of reference.
Lina Akopians, MD, Ph.D., a specialist in reproductive endocrinology at the Southern California Reproductive Center, says that a period that lightens up substantially could be caused by a hormonal issue or a structural one (meaning something happened to an organ in your body). Here are 8 reasons that might explain why your flow is so light.