Our son had a wart and our Dr. recommended Compound W freeze off. It is something you can get over the counter. Takes a couple times before it goes away but eventually it worked. Although don’t know how tolerant she is of pain, does sting a little, I’ve used it also and needs to be held on for 30-45 seconds. Also, duct tape is suppose to work because it doesn’t let air in and it comes off within a week.