Lump In Throat Where Does The Lump In My Throat Come From Durring Periods Of Strong Emotions?

Where does the lump in my throat come from durring periods of strong emotions? - lump in throat

Both times, I am so happy that tears streaming, and it is soooo sad, I cry like a fountain. During these times of strong emotions disturbs me a lump in my throat?

Scientifically, what the cause of the mass? And anyone can describe in simple terms of man is made, I can understand why.

A million thank you!