Pandora's Box (pan-DOR-uhz boks) noun
A source of many unforeseen troubles.
[In Greek mythology Pandora received a "gift" of a jar which she was told never to open. Her curiosity got the better of her. She opened the lid, and out came its contents: all the evils of human life.]
Today's word in Visual Thesaurus.
"Many midwives avoid asking difficult questions, says Stanley, 'because they know that if they open the Pandora's box, they simply will not have the resources to offer the support that the woman will need.'"
-- Lucy Atkins; I Felt Completely Out of Control; The Guardian (London, UK); Jan 29, 2008.