Hi there, that surely sounds odd. I don't want to paint the devil on the wall nor worry you, but does the pain always occur in the same area? If so I suggest you get it checked out by a doctor, as this sounds a lot like bone cancer in early stage. although this disease is highly unlikely to hit people under the age of 40, there are rare cases. I doubt your daughter would have it, but I thought I'd let you know anyways - again not to worry you, but maybe to allow for you to become more aware. I suggest you google an X-Ray of bone cancer and then you'll see what I mean. I hope your daughter is fine and it's gonna go away!!! All the best and have a wonderful day! xxx