Period spotting is light vaginal bleeding that happens outside your regular menstrual period, or very light bleeding at the beginning or end of one. It produces far less blood than a normal period, typically just a few drops you notice in your underwear or when you wipe. Unlike a full period, spotting rarely requires a pad or tampon. About 6% of menstruating people experience spotting between periods in any given year, and most of the time it has a straightforward explanation.
How Spotting Differs From a Period
The clearest distinction is volume. A period produces enough blood to soak through pads or tampons over several days. Spotting is much lighter, often just a small streak or a faint mark on toilet paper. The color is different too. Period blood tends to be darker red, especially as flow increases, while spotting is usually pink or light brown. Brown spotting means the blood is older and has taken longer to leave the body. Pink spotting indicates fresher blood, often mixed with cervical fluid.
Duration also helps you tell them apart. A period typically lasts three to seven days with a recognizable pattern of heavier and lighter flow. Spotting may last only a few hours or, at most, a day or two, with no real buildup or tapering off.
Common Causes of Spotting
Ovulation
About 8% of women notice light spotting around the middle of their cycle when an egg is released. This happens because estrogen dips briefly right after ovulation, and that temporary hormone drop can cause a small amount of the uterine lining to shed. Ovulation spotting is typically pink or light red, lasts a day at most, and may come with mild one-sided cramping.
Hormonal Contraceptives
Starting a new birth control method is one of the most common reasons for spotting. With combination pills, breakthrough bleeding is especially common during the first three to four months and generally fades as your body adjusts. Progestin-only methods, like the mini-pill or the implant, follow a similar pattern but may take three to six months to settle down. Hormonal IUDs cause frequent or prolonged spotting in about 35% of users during the first six months after insertion, but only around 4% still have excessive bleeding a year later. Knowing this timeline can save you a lot of worry if you’ve just switched methods.
Implantation Bleeding
If a fertilized egg attaches to the uterine lining, it can cause very light bleeding about 10 to 14 days after ovulation. This often shows up right around the time you’d expect your period, which is why it gets confused with an early or unusually light period. Implantation bleeding is pink or brown, looks more like vaginal discharge than menstrual flow, and lasts one to two days at most. You should not be soaking through pads or passing clots. Any cramping that comes with it feels milder than typical period cramps. Bright red or heavy bleeding with clots is not implantation bleeding.
Perimenopause
In your 40s (sometimes late 30s), your ovaries begin producing less estrogen, and you may not ovulate every month. This hormonal inconsistency makes your cycle less predictable. Periods may come closer together or further apart, and spotting between them becomes more common. You might also notice that some cycles are much heavier while others are barely there. These shifts are a normal part of the transition toward menopause, which takes several years on average.
Medical Conditions That Cause Spotting
While most spotting is harmless, persistent or recurring spotting can signal an underlying condition worth investigating. Uterine fibroids, which are noncancerous growths in the uterus, are a frequent culprit, particularly if you also have heavier periods or pelvic pressure. Endometrial or cervical polyps, small tissue growths on the lining of the uterus or the cervix, can cause spotting after sex or between periods. Adenomyosis, where uterine lining tissue grows into the muscular wall of the uterus, often produces spotting alongside painful, heavy periods.
Polycystic ovary syndrome (PCOS) disrupts ovulation and can lead to irregular bleeding patterns, including spotting at unpredictable times. Sexually transmitted infections like chlamydia and gonorrhea sometimes cause spotting, particularly after intercourse, along with unusual discharge or pelvic discomfort. Pelvic inflammatory disease, an infection of the reproductive organs that can develop from untreated STIs, is another possible cause.
What the Color Tells You
The color of spotting gives you a rough idea of how fresh the blood is and where it’s coming from. Pink spotting means the blood is fresh and often mixed with cervical mucus. You’ll commonly see this around ovulation or in very early pregnancy. Light brown or rust-colored spotting is older blood that took longer to travel through the cervix and out of the body. This is typical at the very beginning or tail end of a period, or with implantation bleeding. Dark brown spotting that appears regularly between cycles may point to hormonal fluctuations or a polyp. Bright red spotting outside your period is fresher and more active bleeding, which is more likely to need evaluation if it recurs.
When Spotting Needs Attention
A single episode of light spotting between periods is rarely a concern, especially if you can link it to a likely cause like ovulation, a new contraceptive, or the days right before your period starts. But certain situations call for a closer look. Any vaginal bleeding during pregnancy should be evaluated promptly. Bleeding after menopause, when you haven’t had a period in 12 or more months and aren’t on hormone therapy, always warrants a medical visit. Spotting that soaks through pads, comes with severe pain, or happens consistently after sex is also worth bringing up with your provider.
If you’re on continuous hormone therapy after menopause and notice bleeding that’s heavy or persists beyond six months, that’s another situation to discuss with your care team. For anyone still in their reproductive years, tracking your spotting in a period app, noting the color, timing in your cycle, and how long it lasts, gives your provider useful information if you do decide to get it checked out.