- Bleeding after sex (postcoital bleeding) is never normal and should always be checked by a doctor.
- It can be a symptom of HPV-related cervical cell changes (CIN) or, rarely, cervical cancer.
- Investigation typically involves a pelvic exam, a smear test (if due), and often a colposcopy.
- Even if your smear tests are up to date, you must report this symptom to your GP or gynaecologist.
What is Postcoital Bleeding?
Postcoital bleeding is the medical term for bleeding that occurs after sexual intercourse. It's a symptom that should always be investigated, even if it's just a small amount of spotting and happens only occasionally.
There are many potential causes, ranging from simple cervical ectropion (a common condition where cells from inside the cervical canal are present on the outside), vaginal dryness, or infections. However, it can also be a sign of something more serious, like precancerous or cancerous changes on the cervix.
The Link Between HPV and Bleeding
High-risk HPV is the cause of almost all cervical cancers. The virus can cause the cells of the cervix to change, a condition known as cervical intraepithelial neoplasia (CIN). These abnormal areas are more fragile and have more surface blood vessels than healthy cervical tissue.
During sex, friction can cause these delicate areas to bleed. This is why persistent postcoital bleeding is considered a 'red flag' symptom for cervical changes and warrants an urgent check-up.
When to See Your Doctor
You should make an appointment with your GP or a gynaecologist any time you experience bleeding after sex. Don't wait to see if it happens again. It's particularly important if the bleeding is persistent, heavy, or accompanied by other symptoms like pelvic pain or unusual discharge.
While NHS waiting times to see a specialist can sometimes be long, your GP can assess the urgency. Seeing a private gynaecologist is also an option if you're concerned and want a faster diagnosis.
What to Expect at Your Appointment
Your doctor will likely start by taking a detailed history and performing a pelvic examination, including a speculum exam to visualise your cervix. Depending on your screening history, a cervical smear test will be taken to check for HPV and abnormal cells.
If there is a suspicion of abnormal changes, you will be referred for a colposcopy. This is a more detailed examination of the cervix using a special microscope, which allows the gynaecologist to identify any abnormal areas and take a small biopsy if needed.
Frequently asked questions
Is bleeding after sex always a sign of cancer?
No, not at all. Most cases are caused by benign conditions like cervical ectropion, polyps, or vaginal dryness. However, because it *can* be a sign of cervical cancer, it must always be investigated by a doctor.
I've had a normal smear test recently. Why am I still bleeding?
Even with a normal screening result, you should still get checked. Bleeding can come from other sources like the vagina, uterus, or from polyps. A normal smear is reassuring, but it doesn't replace a full clinical examination when you have new symptoms.
Can HPV cause bleeding even if my smear is 'HPV negative'?
It's very unlikely. The modern HPV test is highly sensitive. If you have bleeding and are HPV negative, the cause is almost certainly not related to HPV-driven cervical cell changes. Your doctor will investigate other potential causes.
How soon should I see a doctor about postcoital bleeding?
You should make an appointment as soon as you notice it. Don't wait for it to happen a second or third time. Early investigation leads to peace of mind or, if there is a problem, much more effective and simpler treatment.
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