Sympathetic vs Concerned - What's the difference?

As adjectives the difference between sympathetic and concerned

is that sympathetic is of, related to, showing, or characterized by sympathy while concerned is showing concern.

past tense of concern.

* sympathetick (obsolete)

(en adjective)

Of, related to, showing, or characterized by sympathy.

John looked very upset. I gave him a sympathetic look.

Of or relating to similarity.

Sympathetic magic is based on imitation or correspondence.

* unsympathetic

* parasympathetic nervous system * sympathetic nervous system

(en adjective)

Showing concern.

There was a concerned expression on her face as I told her the news.

Involved or responsible.

The people concerned have been punished.

(head)

(concern)