Spotting that lasts longer than a week usually has an identifiable cause, and while it’s often harmless, it’s not something to ignore. A normal period lasts two to seven days, and bleeding beyond eight days is considered prolonged. If you’ve been spotting for a full week or more, your body is signaling that something is off with your hormonal balance, your reproductive anatomy, or both.
The most common reasons range from hormonal contraceptives still adjusting to ovulation-related hormone dips to early pregnancy and perimenopause. Less common but important causes include infections, polyps, and other structural changes in the uterus. Here’s how to sort through the possibilities.
Hormonal Birth Control Is the Most Common Culprit
If you recently started, switched, or missed doses of hormonal contraception, that’s the most likely explanation for persistent spotting. Breakthrough bleeding happens because your uterine lining hasn’t fully adapted to the new hormone levels it’s receiving. With IUDs, spotting and irregular bleeding in the first few months after placement is extremely common and typically resolves within two to six months. The implant works a bit differently: the bleeding pattern you experience in the first three months tends to be the pattern you’ll have going forward, so if you’re still spotting heavily after that window, it’s worth discussing alternatives with your provider.
Pills, patches, and rings can all cause breakthrough bleeding, especially in the first one to three cycles. Missing a pill or taking it at inconsistent times makes spotting more likely because it creates small dips in hormone levels that trigger the uterine lining to shed a little. If you’ve been on the same method for several months and the spotting is new, that’s a different situation and worth investigating further.
Ovulation Spotting
Around the middle of your cycle, roughly 14 days before your next period, estrogen levels rise steadily and then dip right after an egg is released. That brief hormone drop, before progesterone takes over, can cause light bleeding. Ovulation spotting is typically pink or light brown, lasts no more than a couple of days, and isn’t painful. If your spotting started mid-cycle but has continued well past two days, ovulation alone probably isn’t the explanation.
Could It Be Early Pregnancy?
Implantation bleeding occurs when a fertilized egg attaches to the uterine lining, usually six to twelve days after conception. It’s characteristically light, often brown or pink rather than the bright red of a period, and it lasts anywhere from a few hours to about two days. It’s light enough that a panty liner is all you’d need.
If your spotting has lasted a full week and you could be pregnant, a home pregnancy test is the fastest way to rule this in or out. Spotting that continues beyond a couple of days during early pregnancy can sometimes indicate something that needs medical attention, like an ectopic pregnancy or an early miscarriage, particularly if it’s accompanied by cramping on one side or increasing pain.
Perimenopause and Shifting Hormones
If you’re in your 40s, persistent spotting may be one of the earliest signs of perimenopause. During this transition, the ovaries start producing less estrogen, and some months they release an egg while other months they don’t. That inconsistency disrupts the usual rise-and-fall pattern of estrogen and progesterone that keeps periods predictable. You might notice your periods getting shorter or longer, arriving closer together or further apart, or spotting between them.
One specific concern during perimenopause is a condition where the uterine lining thickens excessively because there’s too much estrogen relative to progesterone. This can cause prolonged or irregular bleeding and is something your provider can evaluate with an ultrasound. The average age of the final menstrual period in the U.S. is 51, but the hormonal shifts that cause irregular bleeding can begin years earlier.
Infections That Cause Spotting
Sexually transmitted infections, particularly chlamydia and gonorrhea, can cause bleeding between periods. These infections can also lead to pelvic inflammatory disease (PID), an infection of the reproductive organs that causes spotting along with pain during sex, lower abdominal pain, and sometimes fever. The tricky part is that chlamydia and gonorrhea often cause no obvious symptoms for weeks or months, so the spotting might be the first clue something is wrong. If your spotting is accompanied by unusual discharge, pelvic pain, or pain during intercourse, STI testing is a straightforward next step.
Polyps and Other Structural Causes
Uterine polyps are small growths on the inner wall of the uterus that can cause bleeding between periods, unpredictable periods, or spotting that doesn’t follow any clear pattern. Some people with polyps have only light spotting, while others experience very heavy periods. Polyps are more common as you get older and are usually benign, but they won’t resolve on their own and are typically diagnosed through ultrasound.
Fibroids, which are muscular growths in or on the uterine wall, can also cause prolonged or heavy bleeding depending on their size and location. Both polyps and fibroids are structural problems, meaning no amount of waiting will make the spotting stop on its own. If your spotting is recurring or becoming a pattern across multiple cycles, these are among the things your provider would look for.
Signs That Need Prompt Attention
Most spotting that lasts a week is more annoying than dangerous, but certain symptoms alongside it signal something more urgent:
- Soaking through a pad or tampon every hour for two to three consecutive hours. That’s no longer spotting; it’s heavy bleeding.
- Severe pain, especially if it’s happening outside your period or is different from your normal cramps.
- Fever with lower abdominal pain, which can point to an infection like PID.
- Spotting after menopause, meaning any bleeding that occurs after you’ve gone 12 full months without a period. This always warrants evaluation.
What Happens at the Appointment
If you do see your provider for prolonged spotting, the visit is usually straightforward. Expect questions about your cycle length, when the spotting started, what color it is, whether you’re on any contraception, and whether you could be pregnant. From there, the most common next steps are a pregnancy test, STI screening, blood work to check hormone levels or thyroid function, and possibly a pelvic ultrasound to look at the uterine lining, polyps, or fibroids. These are all non-invasive and give your provider a clear picture of what’s driving the bleeding.
Tracking your spotting for even a few days before the appointment, noting the color, amount, and any associated symptoms, makes the visit much more productive. Patterns that seem random to you often tell a clear story to a clinician.