On the side of the toe there is a change in color.
I don't know which texture it is. Whether its the normal map or the skin, I'm not sure. But when I go into texture paint mode, and select the blur tool, it barely changes when using it.
I realized its the shape of the topology??? It goes all the way up the foot and cuts off at the front of the ankle in the shape of a seam formed by vertices on the foot
It's also at the place where the map was separated into different sections. EG legs, arms etc