I had one without anaesthetic. It was excruciating as he also cut out a large fibroid. It depends on things like age, if you’ve ever had a vaginal birth and various other criteria. Not everyone has an experience like mine, just make sure you arm yourselves with all the facts so you can ask for sedation and pain relief as required.
I am 67: post menopausal and no children, and I have a closed cervix, so not a suitable candidate for outpatient hysteroscopy. I went into shock, passed out twice and my BP went through the floor.. If I ever have to have one again I will need a GA, not letting a gynae near me with any sharp instruments! The good thing is the lab results were OK and my cancer hasn’t spread.