Menstrual cycles vary among women. A normal menstrual cycle happens every 21 and 35 days, with bleeding that lasts about two to seven days. Flow is usually heavier in the first couple of days and then tapers off, and mild cramping or the occasional small clot is common. When bleeding falls outside that range, happens at unexpected times, or becomes heavy enough to interfere with daily life, it is considered abnormal uterine bleeding, and it is one of the most common reasons women visit their OBGYN.
Abnormal bleeding can look different from person to person. It might mean that periods come more often than every 21 days, cycles stretch past 35 days, bleeding lasts longer than a week, or flow is so heavy you are soaking through a pad or tampon every hour. Spotting between periods, bleeding after sex, and any bleeding after menopause also fall into this category.
Some of these changes are harmless. Stress, travel, illness, and weight shifts can all change a cycle temporarily. But when a pattern of change develops, especially alongside symptoms like fatigue, dizziness, or severe cramps, it is worth getting evaluated.
When to Talk to Your OBGYN
Certain bleeding patterns require prompt attention. Heavy bleeding that soaks through tampons and pads every hour, large clots, or lightheadedness and weakness can point to anemia, or, in severe cases, a medical emergency.
You should also schedule a visit if you notice bleeding between periods, bleeding after sex, periods that have become significantly heavier or more painful, or cycles that stay unpredictable for more than a few months. And bleeding after menopause always warrants evaluation, even if it is just light spotting.
Common Causes of Irregular Bleeding
Abnormal bleeding can stem from a range of causes, and some depend on your age and stage of life.
Hormonal and ovulation changes are among the most common. If ovulation does not happen regularly, the uterine lining can build up and shed unpredictably, leading to irregular or heavy periods. This is especially common during adolescence, after stopping certain birth control methods, and during perimenopause. Polycystic ovary syndrome (PCOS), thyroid disorders, and high stress can all contribute to irregular bleeding as well.
Pregnancy-related causes may also need to be considered. Early pregnancy can cause spotting, and miscarriage or ectopic pregnancy can cause bleeding that requires immediate attention. If your period is late and you have unexpected bleeding, a pregnancy test is an important first step.
Structural changes in the uterus can also contribute to irregular bleeding. Fibroids are noncancerous growths that can lead to heavy bleeding, clots, and pelvic pressure. Polyps can trigger spotting or heavier flow. Adenomyosis, a condition where uterine lining tissue grows into the uterine muscle, can cause both heavy bleeding and painful cramps. These conditions are often very manageable with the right treatment plan.
Infections and inflammation, including sexually transmitted infections, can also cause irregular bleeding, particularly bleeding after sex. Even mild symptoms are worth testing for, because untreated infections can lead to complications.
Finally, medications and contraception can play a role. Hormonal birth control can cause spotting, especially in the first few months of use. Blood thinners and certain supplements can also affect bleeding patterns. If your bleeding changed around the time you started or stopped a medication, that is helpful information for your provider.
What to Expect During an Evaluation
An evaluation typically starts with a detailed conversation about your cycle, how long symptoms have been present, and what your bleeding looks like. It is a good idea to report details like when bleeding occurs, how heavy it is, and any accompanying symptoms to your OBGYN.
Your provider may recommend a pelvic exam, along with lab work to check for anemia, thyroid function, or hormonal imbalances. Imaging, such as a pelvic ultrasound, may be used to get a closer look at the uterus and ovaries. For patients over 45 or those with certain risk factors, an endometrial biopsy may be recommended to evaluate the uterine lining and rule out abnormal tissue changes.
The goal is not just to find the cause, but to give you a clear plan for relief.
How Abnormal Bleeding Is Treated
Treatment depends on the cause, your symptoms, and your personal health goals. For hormonal imbalances, treatment may include options that help regulate the cycle and stabilize the uterine lining. If heavy bleeding has contributed to low iron, supplementation and dietary adjustments are often part of the plan.
When structural issues like fibroids or polyps are involved, your provider may recommend a procedure to address the underlying cause. Some of these can be done in an office setting, while others may be outpatient. If infection is the cause, treatment focuses on clearing the infection and preventing it from returning. And if a medication or contraceptive method is behind the change, adjusting this approach can often make a significant difference.
What You Can Do Before Your Appointment
If you are dealing with irregular or heavy bleeding, a few practical steps can help in the short term. Track your cycle, including start and end dates, how heavily you are bleeding, clots, and any symptoms like fatigue or pain. Prioritize hydration and iron-rich foods like lean meats, beans, leafy greens, and fortified cereals. For cramps, gentle movement and heat therapy can bring some comfort.
If bleeding is very heavy, you feel faint, or you experience sudden intense pain, seek urgent care.
Taking the Next Step
Abnormal bleeding is something your OBGYN sees every day, and you deserve to feel confident that your symptoms are being taken seriously. Whether the cause turns out to be a temporary hormone shift or a treatable condition like fibroids or polyps, early evaluation leads to faster relief and helps prevent complications like anemia.
At Care for Womens Medical Group, our team provides comprehensive gynecology care and supports patients through every stage of life, from cycle changes in early adulthood to perimenopause and beyond. If your period has changed, you are spotting between cycles, or heavy bleeding is affecting your daily life, schedule an appointment with Care for Womens Medical Group. We will help identify the cause of your irregular bleeding, walk you through your options, and create a care plan that supports your health.
