Black lines at the junction of the skull

Udarka450

Help me please.
How can this be fixed? I need to port a model to a game engine and let's say I need a bald character. But there is such an artifact on the head.
These lines are visible at a great distance, but not at close range. But in the game it's unacceptable anyway

This is most clearly seen in the Marvelous Designer program. Genesis 8 base model

cridgit

Redacted

Anarkia333

Oh yea I have sometime this problem on model DAZ.... xD

I put Hair and hide.