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Used to show friendliness or comply with social norms, this smile moves the mouth but typically does not reach the eyes.

Smiling triggers chemical reactions that boost your well-being. What's the science behind a smile? - British Council

Here is a comprehensive guide to understanding, practicing, and improving your smile. 1. The Science and Types of Smiles 0Smile

This is the "gold standard" of authentic enjoyment, characterized by the engagement of muscles around the mouth and the eyes (causing crinkling or crow's feet).

A genuine smile that is being repressed to conceal extreme excitement or emotions. Used to show friendliness or comply with social

A smile is a universal, instinctual human expression used to show joy, connection, friendliness, or even comfort in difficult situations. While often deemed a simple gesture, it is a complex, 43-muscle action that serves as a powerful nonverbal communication tool.

A closed-mouth smile used to indicate submission or discomfort. - British Council Here is a comprehensive guide

An asymmetrical, sneer-like smile indicating disdain or superiority. 2. Physical and Mental Health Benefits