Abnormal Uterine Bleeding: Understanding the Causes and When to Get Evaluated

In a typical week at the clinic, I meet several women who begin the conversation the same way: "I don't know if this is normal." They describe periods that have become heavier, cycles that no longer follow a predictable rhythm, or spotting that shows up between periods without explanation. Often they've been living with it quietly for months, unsure whether it's worth mentioning.

I want to say this clearly: bleeding that feels different from what's usual for you is always worth a conversation. Not because it's necessarily a sign of something serious, but because understanding why it's happening is the only way to feel settled about it — and, if needed, to treat it well.

What Counts as "Abnormal"

Every woman's baseline is different, which is exactly why comparing yourself to a textbook cycle length rarely helps. What matters more is a change from your own normal pattern. That could look like periods that last noticeably longer than they used to, bleeding heavy enough to disrupt your day, bleeding or spotting between periods, cycles that have become significantly shorter or longer, or bleeding after menopause has already been established.

None of these on their own tell us what's causing them. They're simply the signal that it's time to look closer, the same way a persistent cough prompts a doctor to check the lungs rather than assume it will pass.

The Range of Possible Causes

One of the most reassuring things I can tell patients is that abnormal bleeding has many possible explanations, and most of them are manageable once identified. Hormonal imbalance is among the most common — when ovulation becomes irregular, the uterine lining can build up unevenly and shed unpredictably. Structural causes such as fibroids or polyps can also change bleeding patterns, sometimes without causing any pain at all. Thyroid function plays a quieter role than people expect; both an underactive and an overactive thyroid can disrupt cycle regularity. Certain medications, including blood thinners or hormonal contraception during the adjustment period, can also be responsible. Less commonly, changes in the uterine lining itself need a closer look.

The point of evaluation isn't to alarm you — it's to narrow this list down to what's actually happening in your body, rather than guessing.

What an Evaluation Actually Involves

Patients are often more anxious about the appointment than they need to be. A first evaluation is usually straightforward: a detailed conversation about your cycle history, timing, and any accompanying symptoms; a physical examination; and typically an ultrasound to look at the uterus and ovaries directly. Depending on what we find, we may also recommend blood tests to check hormone levels or thyroid function, and in some cases a closer look at the uterine lining using a procedure like hysteroscopy.

Each step builds on the last. We rarely need every test at once — we start with what will tell us the most, and go further only if the picture isn't yet clear.

Why Timing Matters More Than Severity

A pattern I see often is women waiting because the bleeding "isn't that bad" or because it's been going on for a while so it no longer feels urgent. But timing matters here in a different way than people assume — it's not about how heavy the bleeding is, it's about how long an underlying cause has been left unaddressed. A hormonal imbalance that's identified early is generally simpler to manage than one that's been present, unrecognised, for years. The same is true of structural causes like polyps, which tend to stay small and straightforward to treat when caught early.

So the right time to come in isn't when the bleeding becomes unbearable. It's whenever it stops matching your own sense of normal.

Living With the Uncertainty in the Meantime

If you're currently dealing with unpredictable bleeding and haven't yet been evaluated, a few practical things can help while you wait for your appointment: keep a simple log of when bleeding starts and stops and how it compares to previous cycles, note any other symptoms even if they seem unrelated (fatigue, weight changes, skin or hair changes), and don't hesitate to mention how the bleeding is affecting your daily life — that detail changes how we prioritise next steps.

Try not to spend that time searching for worst-case explanations. In the vast majority of the women I see with these symptoms, we find a clear, manageable cause. The uncertainty itself is often the hardest part, and it's the part a proper evaluation resolves fastest.

A Note on Approach

At The Green Nest, we treat this the way we treat every gynaecological concern — with a full evaluation, a clear explanation of what we find, and a plan that fits your life, not a generic protocol. Continuity matters here: seeing the same doctor through your evaluation and any follow-up means fewer repeated explanations and a treatment plan that's actually built around your pattern, not a snapshot of one visit.

If your cycle has been feeling unpredictable, that instinct that something is "off" is worth listening to.

This article is intended for general education and does not replace personalised medical advice. If you have concerns about your menstrual cycle or unusual bleeding, we invite you to book a consultation with Dr. Shilpi Srivastava at The Green Nest.