What is the origin of the idiom "swallow one's pride" and when to use it?

The idiom "swallow one's pride" likely stems from the association between swallowing and the act of suppressing or overcoming one's pride or ego. Swallowing is often associated with a physical action of taking something into the body, and in this case, it symbolizes the internal process of accepting a situation or humbling oneself. This phrase is often used in interpersonal relationships, conflicts, or professional settings where individuals recognize the importance of humility, compromise, or maintaining harmony.