Steer clear of TMI territory.

Beto O’Rourke gave viewers a mouthful in a recent Instagram story, sharing footage of his teeth-cleaning as he invited his dental hygienist, Diana, to recount her experience growing up in El Paso. The former congressman, who documented the exchange as part of a series on Texas border towns, drew charges of oversharing and many a joke that he might someday broadcast his colonoscopy.

The parameters around what’s acceptable to share, particularly at work, may have shifted in recent years: 67% of millennials say they’re likely to share personal details with coworkers on subjects like relationships, family issues and salary, according to a 2014 LinkedIn study, while just a third of Baby Boomers say the same. But that degree of candor isn’t always well-received, as more than three in five employees in a 2014 SurveyMonkey survey reported having at least one colleague who overshares at least once a week.

“A little bit of mystery is not a bad thing. Let relationships, whether they’re professional, romantic, friendship … build organically,” etiquette expert Thomas P. Farley told Moneyish. “What’s the rush?”

Here’s how to handle a colleague, friend, family member or acquaintance who can’t seem to stop sharing personal info in an excessive or inappropriate way â€" and how to make sure you’re not guilty of oversharing, yourself:

Know the difference between bringing your whole self to work and oversharing. The former, marketing strategy consultant Dorie Clark told Moneyish, means that folks shouldn’t have to second-guess themselves or feel judged at work based on fundamental elements of who they are â€" for example, a gay employee not worrying about censoring himself while mentioning weekend plans with a partner.

Oversharing, on the other hand, means “giving people far more information than was requested” or info that wasn’t requested at all, she said. Taboo topics include anything related to your sex life; interpersonal dramas; and medical issues, aside from those confided in a trusted colleague for emotional support or shared with a boss for work-related reasons.

Try not to make too much time for an oversharer, etiquette expert Melissa Leonard said. Listen, don’t ask too many questions, shake your head with sympathy and try saying something brief like, “I’m so sorry you’re going through that” or “Oh, wow, that sounds great â€" let’s catch up later,” she suggested. “When you don’t give them time, they eventually stop coming to you because they realize they find no ear to listen â€" and they’re looking for someone to listen.”

To draw a boundary, “just very gently say to them, ‘That’s not something that I want to discuss right now,’ or ‘That’s not something I’m comfortable talking about â€" can we change the subject?’” etiquette expert Elaine Swann said. While you may come off as brusque, and the person may feel a little embarrassed, “you need to get your point across, and you need to do it quickly and clearly,” Swann said â€" otherwise, they’ll keep making the same mistake.

“You’re not passing judgment; you’re just establishing your own boundaries â€" whether you’re blaming it on too much work you have to do, or that it makes you feel a little bit uncomfortable knowing that much about somebody that you work with,” Farley added.

Keep whatever you hear to yourself, Leonard said, citing examples like an embarrassing health situation or messy divorce. The spread of that information could impact the person’s career, for example, if higher-ups come to view them as someone who can’t handle the demands of their job, she said. “All of a sudden, they don’t send (them) on a project that would’ve been life-changing,” she said.

If your boss overshares, Leonard said, you may have to just grin and bear it. “Be very careful in your reactions, your opinions and your comments,” she added, suggesting you listen, smile and act interested. “If anything, you might learn a little more about (your) boss â€" what their pet peeves are, what their fears are, how to work with them more effectively based on the personal thing they said.” Swann suggested developing ways to escape from the conversation, focusing on work-related excuses.

But a boss who volunteers inappropriate information â€" like details of his weekend strip-club exploits, for example â€" needs to be corrected in a respectful but firm way, Farley said. “Before the conversation progresses, I think you need to set those boundaries: ‘I appreciate that you feel comfortable sharing this with me, but we have a professional relationship and I’d prefer to keep it that way. And I hope you understand.’” If it becomes a persistent problem, he said, you may need to seek out HR.

On social media, Clark pointed out, it’s relatively easy to mute an oversharing coworker in your feed without the drama of unfriending them. If a family member or close friend is posting way-too-personal updates on Facebook, Swann said, it’s fine to shoot them a quick text or call to say it’s “a little bit much for the internet,” and suggest they remove or edit the post.

To avoid oversharing yourself, pay attention to body language. If a person is sitting back, looking away or starting to engage in some other activity, Swann said, those are cues they may be uncomfortable. Are they asking you lots of questions and hanging on your every word, Farley said, or looking at their phone? Recognize, Swann added, that there are certain “key intimate details of our lives that should remain intimate.”

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