<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have recently noticed a ridge on the top of my 9 year old daughters head that wasnt there before, she complains that it hurts when she runs can feeling it bouncing and hurting. Wondering what it could be.She is otherwise healthy, no colds, sore throat, or fever.  <response>: HI, Dear,Thanks for the inquisitive query to Chat Doctor.1-I studied your query in depth.2-In my opinion, the ridge on top of your daughters head -indicates -Cranio-syn-ostosis, 3-Please show it to the pediatric doctor and keep a watch on the -Skull Circumferrence-and mental development and school progress of the child under doctors observation.4-Hope this would solve your query and worry about your 9 yr old daughter.5-Wellcome for more queries to me On Chat Doctor.6-Thnks once again for your inquisitive query. Have a Good Day.!! 