Do you think this is the right way to get rid of a wart?

I went to a dermatologist today. What she did was, she took a needle and poked my warts, and it started bleeding, and she wiped the wart. Then she froze the warts (just once each). I didn’t feel any pain during the freezing process.

I was looking through the web, and saw nothing such as poking the wart with needles before freezing. I’m a little worried now. It’s been 6 hours. and there’s just blood on the warts.

Is this a common method, and will it work?