I am not ashamed in admitting I've lived with this crap for most of my adult life...
es.wikipedia.org/wiki/FoliculitisThere are some horrible examples on the net/google, and mine wasn't the worst, but it was embarrassing and annoying to say the least!
The solution? This!

Just put some on your palm after a shower (avoid soaps), and rub it liberally on your head.
I am completely cured. Yeah it stinks at first, but the stench doesn't last that long.