I echo everyone's advice to take your daughter to the doctor. My son had similar pimple looking things on his bum. They would flair up... and then look like they were going away... and then flair up again, etc.. Long story short about, 6 month or something into this, I took him in. I couldn't believe it, but they were warts! It was a different kind of wart that looked like a pimple. In fact, in it's mature state, it could even get a white head. It eventually burns out (the reason why it could start to go away), but then because it is a highly contagious virus, more would pop up around it. We had to take him to the dermatologist, and he said it is very common among kids by the way. They put some mud-like burning medicine on it. One time did it for him. He is wart free! I did get one on my thumb at one time, and man did it itch! I felt bad waiting so long to take him in. This may not be the case at all, but maybe someone else out there may read this and identify with it. Another thing, dry skin is more susceptible because it is easier for the virus to get in under the skin. Keep the rest of her body lotioned up.