Brown Spotting After Sex: Common Causes and When to Get Checked

The short answer: Brown spotting after sex is usually a small amount of blood that has darkened on its way out. Common causes are friction or vaginal dryness, a harmless change on the cervix called cervical ectropion, infections including STIs such as chlamydia, cervical polyps, a new coil or pill, early pregnancy and, after menopause, thinning of the vaginal walls. It is usually not serious, but the NHS advises getting bleeding after sex checked by a doctor, especially if it happens again.

Is brown spotting after sex normal?

It is common, and in most cases the cause is simple and treatable. Doctors call it postcoital bleeding, which just means bleeding after sex. A review in the journal Obstetrics and Gynecology International found that between 0.7% and 9% of women who still have periods report it at any one time. You are far from alone.

Brown spotting is a small amount of blood that left your body slowly, so it had time to darken. You might see it as a brown smear when you wipe, or a mark on your underwear a few hours later or the next morning. Fresh pink or red streaks straight after sex come from the same causes; the colour mostly tells you how long ago the blood came out. Brown Discharge and Brown Period Blood: What It Means explains the colour change.

Common does not mean it should be ignored, though. The sections below explain why a check-up matters and what it involves.

Why bleeding after sex should be checked

The NHS says bleeding after sex is usually not serious, but it should always be checked by a doctor. That is because the same symptom can come from very different causes: a little friction, an infection that needs antibiotics, a polyp that can be removed, or, rarely, changes on the cervix that need treatment early.

The NHS notes that bleeding after sex can sometimes be a sign of cancer. Please don't panic about this. In younger women it is uncommon, and most bleeding after sex has a harmless cause. But it is the reason doctors take repeated or unexplained bleeding seriously, and the reason a quick examination is worth it.

If it happened once, after rough or dry sex, and has not come back, mention it at your next check-up. If it happens again, book an appointment. If you have been through menopause, get even a single episode checked.

This applies whether you are married or unmarried, in a new relationship or a long one. Doctors are there to help you, not to judge you, and your consultation is confidential.

Common causes of brown spotting after sex

Friction and vaginal dryness

The NHS lists vaginal dryness as a cause of bleeding after sex. When there isn't enough natural lubrication, friction can cause tiny tears in the delicate skin of the vagina or vulva. Mayo Clinic also names friction from low lubrication or not enough foreplay as a cause. This is more likely the first few times you have sex, if you feel tense or rushed, when breastfeeding, after menopause, and with some medicines and contraceptives.

Cervical ectropion

The cervix is the neck of the womb, at the top of the vagina. In cervical ectropion, softer cells that normally line the inside of the cervix spread onto its outer surface. Cambridge University Hospitals NHS explains that these cells bleed more easily, so you may see spotting after sex or between periods, or a little more discharge.

It is linked to oestrogen, so it is more common in younger women, in pregnancy and in women taking the combined pill. It is not linked to cervical cancer. It often needs no treatment and may settle on its own. If it is troublesome, your doctor may suggest changing contraception or a short procedure to treat the area.

Infections, including STIs

Infections can make the cervix inflamed and fragile, so it bleeds with contact. The NHS names sexually transmitted infections such as chlamydia as a cause of bleeding after sex. Chlamydia often causes few or no other symptoms, so feeling well doesn't rule it out. Other infections can also cause inflammation of the vagina or cervix.

Signs that point towards an infection include unusual discharge, a bad smell, itching, pain when peeing, pain during sex or pelvic pain. Vaginal Infections: Signs, Causes and How to Prevent Them covers the common ones, and Why Does Period Blood Smell? Normal Odours and Warning Signs explains which smells are worth a check.

Cervical or womb polyps

Polyps are small growths, usually non-cancerous, on the cervix or in the lining of the womb. The NHS lists polyps as a cause of bleeding after sex. They can bleed when touched. A doctor can often see a cervical polyp during an examination and remove it with a quick procedure.

Early pregnancy

In pregnancy, the NHS explains that changes to the blood vessels in the cervix can cause bleeding, including after sex. Spotting around the time your period is due can also be implantation bleeding. If your period is late, take a pregnancy test. Any bleeding once you know you are pregnant needs advice the same day; see Bleeding in Pregnancy: When to Worry.

A new coil or a change of pill

The NHS lists hormonal contraception as a common cause of bleeding between periods, and spotting can be more noticeable after sex in the first months of a new method or after missed pills. Mayo Clinic also lists an intrauterine device (coil) that is out of place as a possible cause. If you have a coil and notice new bleeding after sex, pain during sex, or can't feel the threads, see your doctor.

After menopause

After menopause, lower oestrogen can make the walls of the vagina thinner and drier, which the NHS calls atrophy. This makes bleeding after sex more likely. But the NHS is clear that any bleeding after menopause must be checked by a doctor, even a small amount, once. Perimenopause: Symptoms, Period Changes and What Helps explains the years leading up to it.

Less common causes

Mayo Clinic also lists genital sores from infections such as herpes, pelvic inflammatory disease, fibroids, skin conditions of the vulva and, rarely, precancerous changes or cancer of the cervix, vagina or womb. Bleeding after sex can also be a sign of injury, including from sex that was forced. If that has happened to you, you deserve care and support, and a doctor can help you safely and confidentially.

Causes at a glance

This table is a starting point, not a diagnosis. Several causes can look the same, which is why an examination matters.

Cervical screening and bleeding after sex

Cervical screening checks the health of the cervix and helps prevent cervical cancer by finding changes early. It is a routine test done every few years. In India, ask your gynaecologist or your local government health centre when and how often you should be screened.

Screening is for people without symptoms. If you have bleeding after sex, don't wait for your next routine test, and don't assume a recent normal result covers it. The review in Obstetrics and Gynecology International notes that a normal smear test does not completely rule out cancer, so a doctor should examine you for the symptom itself.

What the doctor will do

Many women feel shy about this appointment. It helps to know that bleeding after sex is something gynaecologists see all the time, and that you can ask for a female doctor or a chaperone if that makes you more comfortable.

The NHS says a doctor or nurse will ask about your symptoms and medical history. Expect questions about when the bleeding happens, how much, your periods, contraception, sexual partners and whether you could be pregnant. Answering honestly helps them choose the right tests. Then they may suggest:

• a pregnancy test
• an STI test, usually swabs or a urine sample
• blood tests
• an examination of the vagina and cervix with a speculum, a smooth instrument that holds the vagina open gently, only with your consent
• cervical screening if you are due

If needed, the NHS says further tests may include an ultrasound scan, a colposcopy, where the cervix is looked at closely with a magnifying instrument, or a hysteroscopy, where a thin camera looks inside the womb. Treatment depends on the cause: antibiotics for infection, removing a polyp, adjusting contraception, or treatment for dryness.

How to prevent spotting after sex

You can't prevent every cause, but these steps help with the most common ones:

• Take your time. Arousal increases natural lubrication. Rushing is a common reason for friction.
• Use a lubricant. A water-based lubricant, available at most chemists, reduces friction. Oil-based products can weaken latex condoms, so check the packet.
• Be gentle and communicate. Stop or change position if anything hurts. Pain during sex is a reason to see a doctor in itself.
• Use condoms. They lower the risk of STIs, which are a common cause of bleeding after sex, especially with a new partner.
• Get tested. If you or your partner have had other partners, an STI check gives peace of mind.
• Skip douching and scented washes. They can upset the natural balance of the vagina and make irritation and infection more likely.

If dryness is a constant problem, talk to your doctor. There may be a reason, such as your contraception, breastfeeding or menopause, and there are treatments that help.

Staying comfortable afterwards

Light brown spotting usually needs nothing more than a panty liner for the rest of the day. It lets you see how much there is and the colour, which is useful to tell your doctor. Fabpad's disposable liners are fragrance-free, which is kinder to skin that may already be a little sore.

Wash the outside only, with plain water or a mild intimate wash such as Fabpad's, which has a pH of 3.5. Don't wash inside the vagina. Wear breathable cotton underwear. For more on what to wear when spotting comes and goes, see What to Wear on Spotting Days: Liners, Period Panties and More.

When to get checked

See a doctor if

• you bleed after sex more than once
• the bleeding is red and more than a few drops
• you also have unusual discharge, a bad smell, itching, pain when peeing or pelvic pain
• sex is painful
• you also bleed between periods
• you have a coil and can't feel the threads, or have new pain
• you think you could have been exposed to an STI
• you have been through menopause and have any bleeding at all

Get urgent help if

Call 112 or 108, or go to the nearest hospital emergency department, if bleeding is heavy and soaks a pad within an hour, or if you feel faint or dizzy. Get urgent help too if you could be pregnant and have bleeding with severe tummy pain, pain on one side or shoulder-tip pain, which can be signs of an ectopic pregnancy.

Frequently asked questions

Why do I get brown discharge the day after sex? A little blood from friction or the cervix can take a few hours to come out, darkening to brown. It is usually harmless, but see a doctor if it happens more than once.

Is bleeding after sex a sign of cancer? Rarely. Most cases have a harmless cause such as dryness, ectropion or a polyp. Because cancer is one possible cause, doctors advise getting it checked.

Is it normal to bleed after first-time sex? Some women do, and many don't. A little spotting can come from stretching or small tears. Bleeding that is heavy, painful or keeps happening should be checked.

Can a UTI cause bleeding after sex? A urinary infection can cause blood in your urine, which can look like vaginal spotting. If you have burning when you pee or need to go often, see a doctor.

Can the pill cause spotting after sex? Yes. Hormonal contraception can cause spotting, and the combined pill is linked with cervical ectropion, which bleeds easily.

Should my partner get tested too? If an STI is found, yes. Both partners need treatment, or the infection can pass back and forth.

Can I have sex while waiting for my appointment? Your doctor can advise, but using a condom and stopping if it hurts are sensible. If an infection is found, avoid sex until you have both finished treatment.

Is spotting after sex a sign of pregnancy? It can happen in early pregnancy, as the cervix bleeds more easily. Take a test if your period is late.

Related reading

• Ovulation Spotting: Why You Bleed Mid-Cycle and When to Worry
• Spotting Before Your Period: Causes and When to See a Doctor
• Bleeding Again After Your Period Ended? What It Means, by Timing
• Normal Vaginal Discharge: What to Expect Through the Month

This article is for general information and doesn't replace advice from your doctor.

Sources: NHS: Vaginal bleeding between periods or after sex, Mayo Clinic: Vaginal bleeding after sex, Cambridge University Hospitals NHS: Cervical ectropion, Obstetrics and Gynecology International: Postcoital Bleeding: A Review on Etiology, Diagnosis, and Management, NHS: Postmenopausal bleeding