| Pandora's box |
| Bad thing to open |
| Contentious issue |
| Metaphorical mess |
| Potential trouble |
| Touchy situation? |
| Source of problems |
| Unforeseen trouble |
| Kin of Pandora's box |
| Pandora's box, in a way |
| Unforeseen difficulties |
| Source of unforeseen trouble |
| Source of unexpected problems |
| It's similar to a Pandora's box |