Hello I am a 36 year old male suddenly noticed a small depressed area over lambda of skull. I dnt know it's from my birth or not. One of my friend just told me why my skull is like that and from that moment it comes to my mind and make me anxious. It begins at last part of saggital suture, bilaterally symmetrical a small triangular area that homogeneous with occipital bone. Simply it's on the part of posterior fontanelle. I dnt have any problem regarding that. So is it normal or I should consult a doctor.. And why it is like that?