>>397102486
The margins on your textures are too low. Basically, the UV's are too close to the edges of your texture. Pic related.

If you bake your textures, add more padding/margin in Blender. If you aren't baking your textures, open up an image editor and manually color in the edges with a similar color. I think there's tools that can do this easily but this usually happens down the middle of your face and shit, so you can just paint a vaguely skin-colored texture there.