||Relax the face
and lip, and then raise the corner of the mouth.
tension of the cheek muscle, emphasizing the teeth, resulting in sideways expansion
of the cheek and the contraction of the corners of the mouth. Make sure the lower
lip is covering the teeth of the lower, and keep the position for 10 seconds.
||Using your fingers,
check that the corners of the mouth do not move, and keep this position for 10