What is the airflow across and below an elevator? So when an airfoil creates lift. The air above the foil moves faster. This creates lower pressure in tip of the wing and relatively speaking higher pressure under the wing this create lift l. Along with meetings 3rd law of motion. You know it deflects aid downward the reaction is forcing the wing up. But how did this work with an elevator to my understanding. When the elevator goes up so the airflow across the top speeds up, so this creates low pressure. And the air below the elevator is relatively speaking higher pressure. But this would cause the elevator and tail of the plane to go down along with the pitch of the plane. But in realty when the elevator goes up,  the tail of the plane goes down and the pitch goes up. Same with when it goes down the the airflow below the elevator speeds up and become low pressure and the air above it is higher causes the tail of the plane to go down and the pitch up. But in reality when the elevator goes down the pitch also goes down. Really confusing, someone please help.
When an elevator moves (trailing edge) up, it partly moves in the way of the airflow. That means pressure goes up.The elevator is an airfoil itself, in the shade of another airfoil. If it moves up, the same thing happens when a wing moves trailing edge up: lift works downwards.

Image source

Picture above shows an airfoil with trailing edge down: lift is upwards. 


Upper aft side of the airfoil: air only moves faster if the surface moves out of the way of the stream, if the shape moves away gently enough the air still tries to follow. Note that the nose of the shape had pushed air out of the way, so there is less air along the upper aft side of the picture: lower pressure. 
Lower side of the airfoil: air tries to stream like it did before, but now there is a shape in the way of the airstream. The air needs to stream through a narrower stream tube: higher pressure. When the stream bumps into the airfoil at a shallow angle, it gets deflected downwards: impulse lift.