The side of your face is called the profile
It is called the face
Face
To answer this question more details need to be provided. For example one a 3D shape one side is called a face.
An edge.
An edge.
It is called the profile
Slip face.
The steep side of a dune is called the slip face. It is the side of the dune where sand grains are deposited as they slide down due to gravity.
a line
distortional elongated side
Your profile