Is A Hard, Non Moving, Small Lump In The Center Of Throat A Cause For Concern?

Hello. I have a small lump in the center of my throat that is hard and non-moving. My entire throat lacks any normal flexibility and seems very firm. It feels like there is a piece of food caught in my throat and makes swallowing uncomfortable, but not necessarily painful. Is this something I can let go away on its own, or should I seek medical help? Thank you.