Difference between 困る and 困っている


Can someone clarify how 困る is used in Japanese ? The dictionary definition of
困る is given as:

> to be troubled; to be worried; to be bothered; to be embarrassed; to be
> stumped​

and I would expect that a intransitive verb, with a definition similar to it,
to be used as a state ("am/are ~") in the form of ~ている. However I've seen it
being used as both ている form and dictionary form with similar translations:

> あんたは、いつもこういう時に来るんだから、 **困る** んだよ
>
> It's because you always come at times like these that **I'm troubled**
>
> 私も **困っている**
>
> I'm troubled too

In English there is "I am worried" which I would expect to be the 困っている
stative form, and there is "I worry" which seems like it would be a continuous
form in Japanese, and not the dictionary form. Is there a difference in how it
is naturally said in Japanese, i.e. they don't use states or continuous form
for "worry"? If both work what is the difference in nuance between them, e.g.
does one mean that the person _turns worried_ and the other that they _are
being in a state of worry_ ?




  * 困ってる means the subject is _presently_ or _actively_ troubled about something. It emphasises the state of being troubled.
  * 困る emphasises the speaker's anger or annoyance. (困るよ or 困るんだよ)
  * 困った can be used when you realise you're in trouble ('uh oh' or 'oh dear' - 困ったなぁ), or in a similar way to 困ってる.

