Hello Sandy and thanks for posting, 

I am sorry to learn that need to have treatment for CIN3 and can appreciatte that, like any unknown, this can feel a bit daunting.

Entonox is a well established fast acting pain relieving gas mixture that you can have if you need it, the idea is that you can decide for yourself when you need to breath it in. But I expect they will use a local anaesthetic to numb the cervix as well which is given with an injection. So you may not need the Entonox.  

A LLETZ (Large Loop Excision of the Transformation Zone) removes the area of the cervix where abnormal cells usually are, so this should include the area of CIN3 found on the biopsy, but do ask more about this on the day - it is natural to have questions and I am sure they will be happy to answer any you have.

Six months after treatment you will have a screening test (smear) to check that everything is ok. 

If you want to read up on having a LLETZ (it might help to understand the procedure), you can look at our website or the website of another charity, Jo's Trust, at the links below, 

www.cancerresearchuk.org/.../treatment

www.jostrust.org.uk/.../lletz

If you want to give us a call to talk anything over please do. The number to call is Freephone 0808 800 4040 and we are around weekdays, 9-5.

Best wishes, 

Julia