Periods aren't identical from person to person, and that makes it easy to second-guess what's actually normal. Some months run heavier than others, cycles shift by a few days, and none of that necessarily means something's wrong. But when bleeding shows up between periods, lasts far longer than usual, or becomes heavy enough to disrupt daily life, it's worth a conversation with your OB-GYN rather than a guess. At our OB-GYN clinic in Brentwood, NY, we diagnose and treat abnormal uterine bleeding with personalized care. Learn what this condition means, what may cause it, and the treatment options available.
A typical menstrual cycle runs somewhere between 21 and 35 days, with bleeding lasting roughly two to seven days. Abnormal uterine bleeding, sometimes called AUB, covers anything that falls meaningfully outside that pattern \u2014 bleeding between periods, periods that last well past a week, cycles that come far more or far less often than expected, or flow heavy enough to soak through a pad or tampon every hour for several hours in a row.
According to the American College of Obstetricians and Gynecologists, bleeding patterns naturally shift during certain life stages, including the first few years after a girl starts menstruating and again during perimenopause in a woman's late 40s or 50s. Those transitions can bring irregularity that's expected rather than alarming. Still, ACOG's guidance is clear that any abnormal bleeding deserves a conversation with your provider rather than an assumption that it will resolve on its own.
AUB doesn't have a single cause \u2014 it's a symptom with a fairly wide range of possible explanations, and figuring out which one applies to you is the whole point of an evaluation.
Hormonal imbalance sits near the top of the list. When ovulation doesn't happen consistently, the uterine lining can build up more than usual, which leads to irregular or heavy shedding once bleeding does occur. This is common in adolescence, during perimenopause, and in women with polycystic ovary syndrome (PCOS) or thyroid dysfunction, since both conditions interfere with the hormonal signals that regulate a cycle.
Structural causes make up another major category. Fibroids and polyps \u2014 both noncancerous growths \u2014 can distort the uterine lining enough to cause heavier or more frequent bleeding. Cleveland Clinic's overview of abnormal uterine bleeding notes that adenomyosis, a condition where the uterine lining grows into the muscular wall of the uterus, can produce similarly heavy and painful periods.
Medications and devices play a role too. Hormonal birth control can cause breakthrough bleeding, especially in the first few months of use, and copper IUDs are known to increase menstrual flow for some women. Blood thinners and certain other medications can heighten bleeding regardless of the underlying cycle.
Less commonly, abnormal bleeding can signal something that needs more urgent attention, including endometrial hyperplasia or, in rarer cases, endometrial cancer. Clinical researchers use a classification system called PALM-COEIN \u2014 covering polyps, adenomyosis, leiomyoma (fibroids), malignancy, coagulopathy, ovulatory dysfunction, endometrial factors, iatrogenic causes, and not-otherwise-classified causes \u2014 to organize this wide range of possibilities during a workup, as detailed in a clinical review from the National Library of Medicine.
Most abnormal bleeding isn't an emergency, but some presentations are. ACOG advises seeking emergency care immediately if you're soaking through a pad or tampon every hour for more than two hours in a row, particularly if that heavy bleeding comes with chest pain, shortness of breath, or lightheadedness \u2014 all signs the blood loss may be affecting your cardiovascular system. ACOG's clinical guidance on acute abnormal bleeding notes that the initial priority in these acute episodes is assessing for hemodynamic instability before addressing the underlying cause, since stabilizing blood loss takes precedence over diagnosis in a true emergency.
Outside of that acute scenario, abnormal bleeding is still worth addressing promptly rather than waiting it out for months. Chronic heavy bleeding can lead to iron-deficiency anemia, which brings its own set of symptoms \u2014 fatigue, pale skin, and difficulty concentrating among them \u2014 on top of whatever's driving the bleeding itself.
Getting to the bottom of abnormal bleeding usually starts with a detailed conversation about your cycle history: how long your periods last, how heavy the flow gets, whether bleeding happens between periods, and any medications or health conditions that might be contributing. That history alone often narrows down the likely causes before any testing begins.
From there, a pelvic exam checks for visible sources of bleeding and any noticeable changes in the shape or feel of the uterus. Bloodwork can screen for anemia, thyroid dysfunction, and clotting disorders. An ultrasound gives a closer look at the uterine lining and can identify fibroids or polyps that might not be apparent on exam alone. In some cases, an endometrial biopsy \u2014 a brief in-office procedure that samples a small amount of uterine lining tissue \u2014 helps rule out hyperplasia or cancer, particularly for women over 45 or those with risk factors like obesity or PCOS.
None of this needs to happen in a single overwhelming visit. Most practices, including Noor OBGYN, work through these steps in a logical sequence, starting with the least invasive options and moving to further testing only when the history and initial findings point that way.
Treatment depends heavily on what's actually causing the bleeding, so there's no single fix that applies across the board. For bleeding tied to hormonal imbalance, medication is often the first approach. Hormonal birth control \u2014 pills, patches, or a hormonal IUD \u2014 can regulate cycles and reduce flow by stabilizing the uterine lining. Tranexamic acid, a non-hormonal medication taken only during heavy bleeding days, can reduce blood loss for women who prefer to avoid hormonal treatment or who aren't good candidates for it. For bleeding related to conditions like PCOS or thyroid dysfunction, hormone management that addresses the underlying imbalance often improves bleeding patterns as a secondary benefit.
Structural causes sometimes call for procedural treatment. Providers can often remove small polyps in a brief outpatient procedure. Depending on size and location, a provider might monitor fibroids, treat them medically, or recommend surgical removal if they're significantly affecting quality of life or fertility plans. For women who've completed childbearing and are still dealing with persistent heavy bleeding despite other treatment, endometrial ablation or, in more involved cases, hysterectomy may come up as options \u2014 though providers generally try more conservative approaches first.
Because so many possible causes overlap with other symptoms, treatment plans often address more than the bleeding alone. Reproductive-age women dealing with irregular cycles might also be navigating questions about fertility, while women approaching menopause may be managing bleeding changes alongside other transitional symptoms. A good treatment plan accounts for where you are in that broader picture, not just the bleeding pattern in isolation.
Abnormal uterine bleeding can happen at any reproductive age, but certain factors raise the odds. Women at either end of the reproductive years \u2014 those just starting to menstruate and those approaching menopause \u2014 see it most often, simply because ovulation tends to be less consistent during both transitions. Obesity increases risk too, since fat tissue produces estrogen, and excess estrogen without enough progesterone to balance it can thicken the uterine lining more than usual.
Women with PCOS face a higher likelihood of irregular bleeding because the condition itself disrupts ovulation. Thyroid disorders, whether underactive or overactive, interfere with the same hormonal signaling and often show up as a bleeding-pattern change before other symptoms become obvious. A family or personal history of bleeding disorders, including von Willebrand disease, also raises the risk of heavier-than-average periods, and it's a history worth mentioning even if it seems unrelated to your current symptoms.
None of these risk factors guarantee a diagnosis, and plenty of women with abnormal bleeding don't fit any of them cleanly. They're useful mainly as context your provider will ask about, since they help narrow down which tests and which explanations are worth prioritizing first.
A little preparation makes the first visit more productive. Tracking your cycle for a month or two beforehand even with a basic notes app or period-tracking tool gives your provider concrete numbers instead of estimates. Note how many days bleeding lasts, roughly how heavy it feels, whether you're seeing clots, and any bleeding that happens outside your expected period window.
It's also worth listing current medications, including over-the-counter drugs and supplements, since some of them affect bleeding more than people realize. Blood thinners and high-dose fish oil are common examples that patients sometimes forget to mention. If you have a family history of bleeding disorders, heavy periods, or early menopause, bringing that up early can save a round of testing later.
Finally, come with your actual priorities in mind. Some women are mainly looking for symptom relief, others are weighing fertility considerations alongside the bleeding itself, and some just want reassurance that nothing serious is going on. Naming that upfront helps your provider tailor the conversation instead of defaulting to a generic workup.
Abnormal bleeding isn't always a one-appointment problem. Hormonal treatments often take a few cycles to show their full effect, and structural issues like fibroids sometimes need monitoring over months rather than an immediate procedure. Having a provider nearby who already knows your history makes that kind of ongoing management considerably easier than starting over with a new practice every time symptoms shift.
Noor OBGYN serves patients throughout Brentwood and the surrounding Long Island communities, including Islip, Huntington, Bay Shore, and Commack, with the kind of continuity that matters for a condition that often needs a few visits to fully resolve. If bleeding changes come up alongside other concerns \u2014 from urinary incontinence to general obstetric care during pregnancy \u2014 having one practice track the full picture avoids the gaps that come from bouncing between providers.
How much bleeding is considered too heavy?
Soaking through a pad or tampon every hour for two or more consecutive hours is a sign to seek care right away, especially if paired with dizziness or shortness of breath. Short of that emergency threshold, needing to change protection every one to two hours during your heaviest days, passing large clots, or bleeding through clothing regularly are all reasons to bring it up with your provider.
Is bleeding between periods always a sign of a serious problem?
Not necessarily. Breakthrough bleeding is common with certain hormonal birth control methods, especially in the first few months of use, and can also happen around ovulation for some women. That said, mention any bleeding between periods to your provider so they can rule out more serious causes.
Can stress cause abnormal uterine bleeding?
Significant stress can disrupt the hormonal signals that regulate ovulation, which in turn can affect cycle regularity. It's rarely the sole cause of persistent abnormal bleeding, but it's a factor worth mentioning during an evaluation, particularly if bleeding changes lined up with a stressful period in your life.
Do I need an ultrasound for abnormal bleeding, or will a pelvic exam be enough?
It depends on your history and exam findings. Some cases are clear enough from a conversation and physical exam alone, while others benefit from ultrasound imaging to check for fibroids, polyps, or lining abnormalities that aren't detectable by exam. Your provider will typically start with the least invasive option and add testing as needed.
How soon should I expect treatment to work once we start?
It varies by cause and treatment type. Hormonal treatments often take two to three cycles to show their full effect on bleeding patterns, while procedural treatments for polyps or fibroids can bring more immediate change. Your provider should give you a realistic timeline based on your specific treatment plan rather than a one-size-fits-all estimate.
Abnormal uterine bleeding is common, and in most cases, it's manageable once the underlying cause is identified. If your cycle has started looking different from what's normal for you, reaching out for an evaluation is a more useful next step than waiting to see if it resolves on its own.
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