Women's Health

Cervical Screening (Smear Test): Complete Guide

Cervical cancer is almost entirely preventable through regular screening and HPV vaccination. Understanding your results prevents unnecessary anxiety and ensures you get the right follow-up.

Screening age
25–64 (UK) / 21–65 (US)
HPV causes
99.7% of cervical cancers
Frequency
Every 3 years (25–49), 5 years (50–64)
HPV vaccine
Prevents 70–90% of cervical cancers

What Happens During Cervical Screening

  1. A speculum is inserted into the vagina to see the cervix
  2. A small soft brush collects cells from the transformation zone
  3. The sample is tested for HPV (primary test since 2019)
  4. If HPV positive: cells are examined for abnormalities (cytology)
  5. Results sent by post within 2–4 weeks

Understanding Your Results

ResultMeaningAction
HPV not detectedVery low cancer riskRoutine recall in 3 or 5 years
HPV detected — normal cellsHPV present but no cell changes yetRepeat screening in 1 year
HPV + Borderline or mild changes (CIN1)Low-grade change — often clears naturallyRepeat in 1 year
HPV + Moderate changes (CIN2)Moderate pre-cancer — treatment usually neededColposcopy referral
HPV + Severe changes (CIN3)High-grade pre-cancerColposcopy + treatment
Possible cancer cellsUrgent referralColposcopy within 2 weeks
Most HPV Clears Naturally80% of people who test HPV positive will clear the virus naturally within 1–2 years without any treatment. Testing HPV positive does NOT mean you have cancer or will get cancer.

Colposcopy — What to Expect

Colposcopy is a closer examination of the cervix using a magnifying instrument. It takes 15–30 minutes. A vinegar-like solution is applied to show abnormal areas. Biopsies may be taken. Results take 4–8 weeks.

Treatment in ColposcopyWhat It Does
LLETZ (Large Loop Excision)Removes the abnormal area under local anaesthetic — most common
Cold coagulationBurns away abnormal cells
Laser treatmentDestroys abnormal cells with laser
Cone biopsyLarger removal — used for stage 1A cancer
Does a smear test check for all gynaecological cancers?
No — cervical screening only checks for cervical cancer. It does not detect ovarian, uterine (womb), or vulval cancer. These require different investigations.
I'm anxious about smear tests — what should I know?
Tell the nurse. You can ask for a smaller speculum, take a trusted person, lie in a different position, or ask for a break. It's brief (1–2 minutes for the sample) and the discomfort, while real, is usually mild.
Can I have a smear test while on my period?
Ideally not — blood can affect the results. Try to book mid-cycle (usually 1–2 weeks after your period ends).
Medical Disclaimer: This page is for general education only and does not replace professional medical advice. Always consult a qualified healthcare provider.