Should I Be Worried About My Hair Thinning?

I noticed this slightly off patch of hair about mid way down my crown two or three months ago from a photo taken from behind.

My friend couldn’t tell if it was just my hair colour (I have mousy brown hair at the back and sides but it is naturally very highlighted around the front) or if there was an area of thinning.

My barber seems to think it is thinning.

I have not been under any chronic stress, I exercise and eat healthily. I don’t have any hairline recession that I can notice and otherwise my hair on top is long and thick. My normal haircut is a buzz cut on the back and sides.

Should I be worried? Any suggestions?

Thanks in advance for your help.

If you are concerned about hair loss, then you should see a doctor for an exam.  The most common cause of hair loss in men is genetic male pattern balding.  It has nothing to do with stress, diet, or health.  It is genetics.