Spotting is light bleeding that happens outside your regular menstrual period. It’s usually just a small amount of blood, not enough to fill a pad or tampon, and it can show up for many reasons, from hormonal shifts to early pregnancy to stress. Most of the time spotting is harmless, but certain patterns deserve attention.
How Spotting Differs From a Period
The easiest way to tell spotting from a period is volume. A period produces enough blood to require a pad, tampon, or cup, and it typically lasts several days. Spotting produces much less blood, often just a few drops on your underwear or when you wipe. The color tends to be different too: period blood is usually darker red, while spotting is often light pink or brown.
Timing is another clue. You generally know when your period is coming and how long it lasts. Spotting shows up off-schedule. And unlike a period, spotting usually isn’t accompanied by the other menstrual symptoms you’re used to, like breast tenderness, bloating, or cramping. If you notice light bleeding without those familiar signals, it’s likely spotting rather than an early period.
Ovulation and Mid-Cycle Spotting
About 8% of women experience spotting around ovulation. This typically happens at the midpoint of your cycle. In a standard 28-day cycle, that’s roughly day 14, or about halfway between the start of one period and the next. The spotting is caused by the brief hormonal fluctuation that occurs when an egg is released. It’s light, short-lived, and completely normal.
Hormonal Birth Control
Spotting is one of the most common side effects of hormonal contraception, especially in the first few months after starting a new method. It’s sometimes called breakthrough bleeding. Extended-cycle or continuous-cycle birth control pills are more likely to cause it than traditional monthly packs, but any hormonal method can trigger spotting while your body adjusts. The good news is that breakthrough bleeding generally decreases over time as your body adapts to the new hormone levels.
Implantation Bleeding in Early Pregnancy
If you could be pregnant, light spotting may be an early sign. When a fertilized egg attaches to the uterine lining, it can cause a small amount of bleeding known as implantation bleeding. This usually happens about 7 to 10 days after ovulation.
Implantation bleeding looks different from a period. The blood is typically brown, dark brown, or pink, and it’s light and spotty, sometimes more like discharge than actual bleeding. It lasts a day or two at most. If you notice this type of spotting around the time your period would be due, a pregnancy test is a reasonable next step.
Stress and Low Progesterone
Your hormonal system is interconnected, and disruptions at one level can ripple outward. High stress is a common culprit. When stress spikes your cortisol levels, it can suppress estrogen and other reproductive hormones, throwing off your cycle enough to cause spotting, missed periods, or other irregularities.
Low progesterone can also be behind spotting, particularly light bleeding in the days before your period arrives. Progesterone is the hormone responsible for building up and maintaining your uterine lining each cycle. When levels drop too early or too low, the lining can start to break down ahead of schedule, producing spotting. In pregnant women, low progesterone may also cause light bleeding and is worth mentioning to a healthcare provider.
Fibroids, Polyps, and Structural Causes
Uterine fibroids are noncancerous growths in or on the uterus, and they’re extremely common. One of their hallmark symptoms is spotting or bleeding between periods, along with heavier or more painful periods than usual. The location, size, and number of fibroids all influence how much bleeding they cause. Fibroids that bulge into the uterine cavity tend to produce the most noticeable symptoms.
Uterine polyps, which are small growths on the uterine lining, can cause similar between-period spotting. Both fibroids and polyps are typically benign, but they sometimes need treatment if they cause persistent symptoms or interfere with fertility.
Infections That Cause Spotting
Certain sexually transmitted infections can cause spotting as one of their symptoms. Chlamydia is known for causing bleeding between periods, often without other obvious signs in the early stages. Gonorrhea can cause heavy menstrual bleeding, bleeding between periods, or unusual discharge that may be bloody. HPV infections can trigger bleeding during or after sex. Because these infections are treatable and can cause serious complications if left alone, unexplained spotting combined with unusual discharge, pelvic pain, or a new sexual partner is worth getting tested for.
Spotting During Perimenopause and After Menopause
In the years leading up to menopause, fluctuating hormone levels make irregular bleeding and spotting very common. Cycles may become shorter, longer, heavier, or lighter, and spotting between periods is a frequent part of that transition.
Spotting after menopause is a different situation. Any bleeding that occurs after you’ve gone 12 full months without a period should be evaluated. In a large study cited by the National Cancer Institute, approximately 9% of postmenopausal women who saw a doctor for bleeding were later diagnosed with endometrial cancer. That rate ranged from about 5% in North America to 13% in Western Europe. The vast majority of cases turned out to be benign, caused by thinning of the vaginal or uterine lining or polyps. But because the risk of cancer is real, postmenopausal bleeding is one situation where prompt evaluation matters.
Patterns Worth Paying Attention To
Occasional spotting that’s light and brief is rarely a concern. But certain patterns signal that something more is going on. Spotting that happens repeatedly over multiple cycles, gets heavier over time, or is accompanied by pelvic pain, fever, or foul-smelling discharge deserves investigation. Bleeding that’s heavy enough to soak through a pad in an hour or less, or that leaves you feeling dizzy or lightheaded, requires urgent attention because it may indicate significant blood loss.
Spotting after sex that happens more than once, bleeding after menopause, or spotting during pregnancy are all worth a medical visit regardless of how light the bleeding seems. In most cases, the cause turns out to be manageable. The point of getting checked is to catch the rare cases that need treatment early, when outcomes are best.