Cervical intra-epithelial neoplasia (CIN) is a term that describes abnormal changes of the cells that line the cervix. CIN is not cancer. But if the abnormal area is not treated, over time it may eventually develop into cancer of the cervix (cervical cancer).
CIN does not cause any symptoms. You are not likely to find out you have it unless you have cervical screening. Screening uses tests to find abnormal changes and to check whether they should be treated.
Some abnormal changes will go back to normal naturally. But if you do need treatment, this is usually very effective. Treatment removes or destroys the abnormal cells and prevents cancer developing in the future.