I was troubled by the same thing, or I still am, dunno. But I have similar "problem". Tried taking some photos under different angles and lightning and honestly, there is a big big difference if you are standing under sunlight, under direct bathroom light or in normal room light conditions.
You got dark hair, white scalp, there is a big contrast difference, it can't look good.
But if it ease your mind, I had that same issues 10y ago, and now, 10y later, I'm in my late 20 and nothing really changed.