K.G.
D.,
I don't know if this will help but when I was in high school I got planters warts on the bottom of my feet. I had at least 20 at a time, they were painful. Now I don't remember the pain level of the freezing but that is what I had done too. What the doctor did tell me and helped alot, was soaking in hot salt water. Now I'm not sure how that would work with a 3 year old, but it made them get smaller much faster! Add lots of salt to as hot as she can stand the water to be. And soak for 15 minutes everyday. After soaking, I'd have to scrape the dead cells off. when they are soft it's pretty easy to do. This was what I did before and in between the freezing process. I hope my suggestion helps, as I can feel her pain!
K.