Collocations for troubled - adj.

be, feel, look

extremely, fairly, very, etc.
a singer with an extremely troubled past

deeply, greatly, particularly
a little, slightly, etc.
vaguely
She still felt vaguely troubled by it all.

increasingly
emotionally, financially
financially troubled companies

at, by
He was deeply troubled by the news.

Troubled is used with these nouns:
adolescent, childhood, conscience, economy, expression, face, mind, past, region, relationship, sleep, soul, teenager, time, youth