Intermenstrual bleeding: definition and meaning
Intermenstrual bleeding is any vaginal bleeding that happens between your periods, from light pink or brown spotting to heavier flow. It's common and often harmless, for example around ovulation or when starting hormonal birth control. But repeated or unexplained bleeding between periods should be checked by a doctor, because infections, polyps and cervical changes can cause it.
Common causes
| Cause | What it's usually like |
|---|---|
| Ovulation spotting | A day or two of light spotting mid-cycle |
| Breakthrough bleeding on the pill, IUD or implant | Light, irregular bleeding, often in the first months |
| Implantation bleeding | Light spotting around when a period is due |
| Perimenopause | Unpredictable bleeding as cycles change |
| Polyps, fibroids, infection or cervical changes | Repeated spotting, sometimes after sex |
Why it matters
Bleeding between periods is a symptom, not a diagnosis. Often it's hormones shifting. Sometimes it's an infection such as chlamydia, or a growth like a polyp or fibroid. Logging when it happens, how much, and whether it follows sex gives a doctor useful clues.
Unexpected bleeding is also unsettling, and many people feel anxious until they know why. A short note in your tracker turns a worry into a pattern you can show someone. Full guide: spotting between periods.
See a doctor if bleeding between periods keeps happening, happens after sex, comes with pelvic pain, fever or unusual discharge, if you might be pregnant, or if you've been through menopause. Keep up with cervical screening.
Frequently asked questions
Is bleeding between periods normal?
Light spotting once in a while, especially around ovulation or with new birth control, is common. Repeated or heavier bleeding isn't something to ignore.
Can stress cause bleeding between periods?
Stress can shift hormones enough to cause light spotting for some people, but don't assume stress is the cause if bleeding keeps coming back.
What is the medical term for bleeding between periods?
Intermenstrual bleeding. Older texts call irregular bleeding between periods metrorrhagia.
Sources
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
Spotting between periods: common causes and when to get checkedSpotting between periods can be ovulation, your contraception or something to check. The common causes, how to tell them apart, and the red flags.
What is spotting?Spotting is very light bleeding outside your normal period, often pink or brown. Common causes, how it differs from a period, and when to see a doctor.What is metrorrhagia?Metrorrhagia is an older medical term for bleeding between periods, at irregular times. What causes it, when it's normal, and when to see a doctor.
What is ovulation spotting?Ovulation spotting is light pink or brown bleeding around ovulation, linked to a brief dip in estrogen. What it looks like and when to get it checked.
Why am I spotting mid-cycle?Mid cycle spotting is often ovulation spotting: a day or two of pink or brown bleeding when estrogen dips. How to tell, other causes, and when to check.