I had 2 colposcopies a few years back. I had abnormal cells for 2 years, CIN 1 I think they called it. They just monitored it + the cells eventually cleared up on their own. They took regular smears as well + eventually I was all clear. I didn't need treatment but a couple of my friends had the bad cells removed, by burning/lasering I think. Both were done under local anaesthetic + both friends are fine now.