What is the origin of the idiom "a frog in one's throat" and when to use it?

The origin of the idiom "a frog in one's throat" is unclear, but it likely stems from the idea of someone having difficulty speaking or clearing their throat due to a hoarse or croaky voice. The comparison to a frog in the throat emphasizes the sound or sensation of the voice being affected. It is used to describe a temporary hoarseness or difficulty speaking due to irritation or a tickling sensation in the throat. It implies a vocal problem that affects the clarity or smoothness of one's voice.