Hi There, I have just discovered a ridge on my son s skull (after giving him a haircut) that runs ear to ear (not all the way to his ears....stopping about 3 inches above each ear). He will be 5 years old in 3 weeks and I have never noticed this ridge before, however, this is the shortest I have cut his hair in quite a while. So, I m not sure if the ridge has always been there and we just didn t notice it, or if it has just developed over the last little while. It is hard and there is no pain associated with it. I have read online about craniosynostosis and now am extremely worried. However, he does not have any other abnormalities regarding his facial features or any other part of his skull. He has no developmental delays and has always been a generally happy, healthy little boy. I will be calling our doctor tomorrow for an appointment, but I d love to know if ridges in skulls can be normal? Or, if you find a ridge, is it automatically something to worrry about. Any insight you can give would be greatly appreciated! Thanks for your help!