I welcome you to health care magic for your health concerns I am Dr Fahim, General Surgeon and I will be answering your query I have gone through your question and understood your concerns. With available information it appears to be as a result of some trauma. Most important signs in head injury are vomiting, loss of consciousness, ear, nose, throat bleed. If none of the mentioned signs are there in your daughter then I think you need to worry much only some over the counter analgesics will suffice. However if she is sure about to trauma encounters then I advise you get an x-ray skull and see a surgeon to rule out any other rare pathologies. Wishing you and your daughter all the best and rapid recovery. I hope my answer will help you. Do rate my answer if you like it. Regards