The problems I see is that for some reason eyelids makes shadows on the eyeballs, which doesn't make sense. Eyeballs should be more forward. And while on the eyelids, they're very cartoonish (in that they have straight lines and don't look that organic).
The face doesn't actually look like the one on the photograph - face is shorter and nose and lips are too big.
And the hair, please stop doing that, unless the hair is reeeeeeeeally short (like a soldier or something), don't draw the hair on the head model. You can have hair as a separate model, as a hair and fur modifier or as the same model but actually modelled, but don't texture it onto a person. If you can't achieve that transition correctly then edit the texture so there's no hair.
The edge of the lips might be what Ryan mentioned, or something similar. When there are too many polygons in one place, which are all twisted around, there's probably some overlapping and that needs cleaning up.
The face doesn't actually look like the one on the photograph - face is shorter and nose and lips are too big.
And the hair, please stop doing that, unless the hair is reeeeeeeeally short (like a soldier or something), don't draw the hair on the head model. You can have hair as a separate model, as a hair and fur modifier or as the same model but actually modelled, but don't texture it onto a person. If you can't achieve that transition correctly then edit the texture so there's no hair.
The edge of the lips might be what Ryan mentioned, or something similar. When there are too many polygons in one place, which are all twisted around, there's probably some overlapping and that needs cleaning up.