I had it, and mine weren't particularly itchy or painful. For me, I found that if I popped them (or they popped on their own,) then that particular bump would go away. I never treated with a dermatologist for it, so I'm sorry that I don't know what the conventional treatments are for it. I just wanted to mention that in my experience, popping them made them go away. They contain a whitish 'head' of sorts, that if you squeeze/pop it, and get that white head out, then they go away. Be aware, though, that they may bleed when you do this. Some of mine bled quite a bit when I popped them, but I don't remember that being particularly painful... but it has been a while, so I can't exactly remember... But I also know you may not have that option being that it's your daughter. I don't think I could pop them on my child. It's different if it's on your own body...
I'd suggest going to see a dermatologist, if you haven't already. But my only personal experience advice is that when they pop and the contents come out, they will disappear at that point.