My daughter is ten years old and she has had three nose bleeds within the last seven minutes what do I do?

If it's been three nose bleeds in the last seven minutes, it's probably actually one nose bleed that hasn't fully stopped. They can be persistent. It can take a while to really stop. Have her sit down, head forward, with kleenex and recognize this is common and not a big deal. It's probably from dry nasal passages. Just like we get chapped lips in winter weather, the nasal passages can get irritated and crack and little capilaries can start bleeding.