I have this lump in my throat

I have this lump in my throat.
It sits floating, much like a boat.

I have questions as to why it is there.
But the fruit of this tree, I fear will not bear.

Maybe it's because I'm depressed.
But one could also say it is stress.

Perhaps I don't go out enough.
But why? The weather's so rough.

Perchance it's the cold.
But on this I'm not sold.

I don't think it's cancer.
Or a tumor, it's not stranger.

He says it's mental.
To which I say, be more gentle.

But at the end of the day,
It vanished and went away.

So I'm left pondering,
When it'll return, wandering.