In adults, surgery for correction of skull irregularities is not common and is generally not followed only for cosmetic purposes. If you have any indentation or growth in skull then you may need to get a CT head done to confirm the cause.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
The center of my skull probably needs to be trimmed down by about inches. Since you say they probably wouldnt do anything like that to reshape it, do you think they would do fillers?