The short explanation
CIN stands for cervical intraepithelial neoplasia. It describes changes in the cells on the surface of the cervix, the neck of the womb, found during screening or colposcopy. CIN is graded 1, 2 or 3. CIN 1 is the mildest grade and is not cancer. CIN 1 is usually caused by HPV, a very common virus. In most women, the immune system clears the virus and the cells return to normal on their own, often within one to two years. That is why doctors usually recommend a repeat check rather than treatment for CIN 1. The review is important, so the doctor can confirm the changes have cleared or catch any progression early.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Not smoking helps the body clear HPV.
- If you have not had the HPV vaccine, ask whether it would still be useful for you.
- If you have new symptoms, such as bleeding after sex, between periods or after menopause, do not wait for the review.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot tell what your results mean in detail. Your doctor can explain your report and follow-up plan.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- What does CIN 1 mean in my case?
- Do I need treatment now?
- When exactly is my review, and what will it involve?
- Should I have the HPV vaccine?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Book an appointment soon
- See a doctor within a couple of weeks if you have bleeding after sex, between periods or unusual discharge.
Raise it at a routine appointment
- Attend your review in a year as advised, and call the clinic if you have questions before then.
Sources
The evidence this explanation is built on.
- Cervical screening results NHS
- Colposcopy NHS
- Cervical screening NHS
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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