Open a can of worms

Open a can of worms

Definition
Open the can of worms
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“Open the can of worms” is an interesting idiom that refers to a situation or action that leads to a lot of problems or complications. When someone says they’ve “opened a can of worms,” it means they’ve started something that is now causing unexpected difficulties or creating a whole new set of issues. Imagine a can of worms, sealed tightly, with all the worms inside. If you were to open that can, the worms would spill out and create a messy and chaotic situation. In the same way, when someone “opens a can of worms” in a figurative sense, they introduce a topic or take an action that unravels a series of complications or problems.

It's like when you bring up a sensitive subject during a family gathering and it leads to arguments and hurt feelings. You didn’t expect all those issues to arise, but by mentioning that topic, you inadvertently “opened a can of worms.” This idiom is often used to caution against delving into a topic or taking an action that could potentially cause more trouble than it’s worth. It’s a way of saying, “Be careful, because this could lead to a lot of unexpected problems.”

Example sentences
I didn’t realize how complicated it would be when I opened the can of worms by asking about everyone’s opinions on politics.
Bringing up the topic of salary at work can often open a can of worms, as people have different expectations and perspectives.
When my friend asked about his ex-girlfriend, I warned him that he might be opening a can of worms and stirring up old emotions.
I thought I was just making a harmless comment, but it ended up opening a can of worms and sparking a heated debate.
Sharing my personal struggles with mental health opened a can of worms, as others began opening up about their own experiences.