Smiling lips are a natural expressionless state of the face, and the lips look like smiling, and the corners of the mouth will rise slightly. M lip is M-shaped, with lip peak, lip wing and lip bead.
Usually, when making smiling lips, only one corner of the mouth rises, because only one corner of the mouth rises, which may lead to the unsmooth connection between the corner of the mouth and the corner of the mouth, and eventually lead to the corner of the mouth being stiff. In order to make smiling lips more natural, it is usually suggested to synthesize smiling lips to improve the corners of the mouth, lips, lip peaks and lip bead as a whole, so as to make the radian look smoother. The smiling lip is equivalent to a lip composition, while the M lip is equivalent to a separate lip item.
If you want to change your lip shape, you can go to a regular local medical plastic surgery institution. Combined with many factors such as face shape, facial features, and expectations of lips, the doctor will make corresponding adjustments.