Spotting is light vaginal bleeding that happens outside your regular period. It produces so little blood that you typically don’t need a pad or tampon, and it often shows up as pink or brown marks on underwear or when wiping. About 6% of women experience spotting between periods in any given cycle, and the causes range from completely harmless hormonal shifts to conditions that need medical attention. Understanding the timing, color, and pattern of your spotting helps narrow down what’s going on.
Spotting vs. a Period
The biggest difference is volume. A period produces enough blood to require a pad, tampon, or cup and typically lasts three to seven days. Spotting is much lighter, often just a few drops, and can last anywhere from a few hours to a couple of days. Period blood tends to be darker red, while spotting is usually pink or brown because the small amount of blood has more time to oxidize before leaving your body.
Your other symptoms matter too. If you normally get breast tenderness, cramping, or bloating before your period and none of those are present during the bleeding, that’s a strong signal you’re dealing with spotting rather than an early or unusual period.
What the Color Tells You
Brown spotting is older blood that sat in your uterus long enough to oxidize. It’s common at the tail end of a period, during early pregnancy, or during perimenopause when hormonal fluctuations affect how regularly your uterine lining sheds. Brown spotting can also occur with conditions like polycystic ovary syndrome (PCOS), where the uterine lining builds up but doesn’t shed on a normal schedule.
Pink spotting is usually a small amount of blood mixed with cervical fluid. It’s typical during ovulation, early pregnancy, or when estrogen levels are low. Orange-tinged spotting can also be normal (blood mixing with cervical fluid), though it sometimes signals an infection.
Bright red spotting means fresh blood is flowing actively. Between periods, this can point to infections, polyps, fibroids, hormonal changes, or birth control side effects. Gray discharge is the one color that always warrants a call to your doctor, as it can indicate an infection or miscarriage.
Hormonal Shifts During Your Cycle
One of the most common and least worrisome causes of spotting is ovulation. Around the midpoint of your cycle, estrogen levels rise steadily, then dip right after your ovary releases an egg. Progesterone takes over at that point, and this quick hormonal handoff can cause a day or two of light bleeding. Ovulation spotting is fairly common and is usually pink or light brown. If you track your cycle, you’ll notice it falls roughly 14 days before your next expected period.
Birth Control and Breakthrough Bleeding
Hormonal birth control is one of the most frequent causes of spotting, especially in the first few months of use. Breakthrough bleeding happens more often with low-dose and ultra-low-dose pills, the hormonal implant, and hormonal IUDs. It also tends to show up when you use pills or the ring continuously to skip periods altogether, because the uterine lining slowly builds up without a chance to shed.
With an IUD, spotting and irregular bleeding in the first two to six months is normal and usually improves on its own. The implant works differently: whatever bleeding pattern you have in the first three months tends to be your pattern going forward. If you’re skipping periods with pills or the ring and getting unpredictable spotting, scheduling a withdrawal bleed every few months can help. It gives the uterine lining a chance to reset.
Early Pregnancy
About 1 in 4 pregnant women experience implantation bleeding, which happens when a fertilized egg attaches to the uterine lining. It typically occurs 10 to 14 days after ovulation, which means the timing can overlap with when you’d expect your period. Implantation bleeding is usually pink or brown, much lighter than a period, and lasts a short time. If you’re spotting around the time your period is due but the bleeding is unusually light and you have other early pregnancy symptoms, a home pregnancy test is a reasonable next step.
Perimenopause
Perimenopause typically starts in your mid-40s, though it can begin as early as your mid-30s or as late as your mid-50s. During this transition, estrogen levels fluctuate unpredictably rather than declining in a straight line. These hormonal swings throw off the balance with progesterone, which can cause your periods to become irregular, heavier, lighter, or spaced further apart. Spotting between periods is a hallmark of this phase. Brown spotting is especially common because the lining may shed unevenly or slowly.
Structural Causes: Polyps and Fibroids
Uterine polyps are small growths that form on the inner wall of the uterus when cells in the lining overgrow. They’re sensitive to estrogen, meaning they grow in response to the hormone your body naturally produces. Polyps can cause spotting between periods, bleeding after sex, or unusually heavy periods. Some people with polyps have only light spotting, while others have no symptoms at all. Fibroids, which are noncancerous growths in or on the uterine wall, cause similar symptoms. Both are typically identified through an ultrasound or a procedure where a small camera is inserted into the uterus.
Infections
Sexually transmitted infections, particularly chlamydia, can irritate the cervix or uterine lining enough to cause spotting. This type of bleeding is sometimes bright red and may occur after sex. Other infections of the vagina, cervix, or uterus can also trigger bleeding between periods. If your spotting is accompanied by unusual discharge, odor, pelvic pain, or fever, an infection is worth investigating.
When Spotting Signals Something Serious
Most spotting turns out to be harmless, but certain patterns deserve prompt medical attention. The American College of Obstetricians and Gynecologists considers bleeding abnormal in these situations:
- Spotting or bleeding after sex
- Cycles shorter than 21 days or longer than 35 days
- Cycle length that varies by more than 7 to 9 days
- Bleeding that lasts more than 7 days
- No period for 3 to 6 months (when not pregnant)
- Any bleeding after menopause
Postmenopausal bleeding is always considered abnormal and needs evaluation, even if it’s just a small amount of spotting. And if you’re soaking through a pad or tampon every hour for more than two hours and feel dizzy, lightheaded, or short of breath, that’s an emergency.
For occasional, light spotting that doesn’t fit any of these red flags, tracking the timing, color, and any associated symptoms for two or three cycles gives you and your doctor useful information to work with if it continues.