Spotting is any light vaginal bleeding that happens outside your regular period. It’s typically just a few drops of blood, enough to leave a small mark on underwear or toilet paper but not enough to fill a pad or tampon. While a normal period lasts 4 to 7 days and follows a predictable cycle, spotting is lighter, shorter, and can show up at almost any point in your cycle.
How Spotting Differs From a Period
The simplest way to tell spotting apart from a period is volume. A period produces a steady flow that requires a pad, tampon, or cup. Spotting produces so little blood that a panty liner is more than enough, and many people notice it only when wiping. Most menstrual cycles fall between 24 and 34 days apart, and the bleeding fills several days. Spotting can last a few hours or a couple of days, and it doesn’t follow that same rhythm.
Color is another clue. Spotting often appears pink (blood diluted by cervical fluid) or brown (older blood that sat in the uterus long enough to oxidize before leaving the body). A period usually starts or peaks with bright red blood, which signals a fresh, steady flow. Brown or pink discharge between periods is one of the most common forms of spotting.
Common Causes of Spotting
Ovulation
Some people notice a day or two of light bleeding right around the middle of their cycle. Estrogen drops just after the ovary releases an egg, and for some, that temporary hormone dip causes a small amount of the uterine lining to shed. Ovulation spotting is usually pink or light red and resolves on its own within a day.
Hormonal Birth Control
Breakthrough bleeding is one of the most frequent reasons for spotting, especially with low-dose and ultra-low-dose birth control pills, hormonal IUDs, and the implant. With an IUD, spotting and irregular bleeding are common in the first few months after placement but typically improve within 2 to 6 months. With the implant, the bleeding pattern you see in the first 3 months tends to be the pattern going forward. People who use pills or the ring on a continuous schedule to skip periods are also more likely to experience breakthrough bleeding.
If the spotting is bothersome, adjustments can help. Switching to a slightly higher-dose pill, for example, or using short-term supplemental estrogen alongside an IUD or implant are options a provider may suggest.
Implantation Bleeding
About 1 in 4 pregnant people experience light bleeding when a fertilized egg attaches to the uterine lining, roughly 10 to 14 days after conception. Implantation bleeding is usually pink or brown, lasts a day or two, and can easily be mistaken for a light period arriving early. If you’re sexually active and notice unexpected light bleeding around the time your period is due, a pregnancy test is worth taking.
Perimenopause
In the years leading up to menopause, estrogen and progesterone rise and fall unpredictably. Ovulation becomes irregular, and periods may come closer together or further apart. Flow can swing from very light to unusually heavy, and spotting between periods is common during this transition. These changes are driven by the same hormonal shifts that eventually end menstruation altogether.
Polyps and Fibroids
Uterine polyps are small growths that form when cells in the uterine lining overgrow, often in response to estrogen. They can cause bleeding between periods, unusually heavy periods, or spotting after menopause. Fibroids, which are noncancerous muscle growths in or on the uterus, produce similar symptoms. Both are common and treatable, but persistent spotting is worth mentioning to a provider so the cause can be identified.
Infections
Sexually transmitted infections like chlamydia and gonorrhea, as well as pelvic inflammatory disease, can irritate the cervix or uterine lining enough to cause spotting or cramping throughout the month. Normally the cervix acts as a barrier, keeping bacteria from spreading deeper into the reproductive tract. When an infection disrupts that barrier, inflammation can trigger irregular bleeding alongside other symptoms like unusual discharge or pelvic pain.
What the Color Tells You
The shade of spotting gives you a rough sense of what’s going on. Brown blood is older blood that took longer to leave the body, common at the tail end of a period or during light spotting days. It can also appear during early pregnancy, perimenopause, or with conditions like polycystic ovarian syndrome. Pink blood is usually fresh blood mixed with cervical fluid, typical of ovulation spotting or very light flow days. Bright red blood between periods signals active, fresh bleeding and has a wider range of potential causes, from hormonal fluctuations and birth control side effects to polyps, fibroids, or infections.
None of these colors alone confirms a diagnosis, but they help you describe what’s happening when you talk to a provider.
When Spotting Needs Attention
Most spotting is harmless, but certain situations call for a closer look. Any bleeding during pregnancy could signal a complication and should be evaluated promptly. Bleeding after menopause is never considered normal and always warrants investigation. And if you’re soaking through a pad or tampon every hour for more than 2 hours in a row, especially with chest pain, shortness of breath, or dizziness, that’s a medical emergency.
Outside those urgent scenarios, persistent or recurring spotting that disrupts your daily life or your sense of well-being is still worth bringing up. A provider can often pinpoint the cause with a physical exam and, if needed, imaging like an ultrasound to check for polyps, fibroids, or other structural changes. Knowing the cause turns vague worry into a clear plan.