What Causes A Dent At The Front Of The Skull?

I m 29 years old. Last night I noticed a dent in the front of my skull. When you feel it, it feels more like a cut in the skull. Like a sliver of the skull is missing. The only thing I can rememeber that involved any head trama is when I was very young I fell into some rocks head first. Is this something I should get looked at? I don t have any kind of headaches or fainting moments. I m just worried about it because I ve never noticed it before.