If someone was just talking about you, you'll likely notice small changes in their usual personality. Are they holding themselves differently? Does their laugh seem off? Do they greet you in a different way?

"The biggest [sign] is that they act differently with you than they normally do," body language expert Patti Wood, MA, tells Bustle. "We have a 'baseline' of normal interactions with the people we know, and when people are nervous and fear being 'discovered' as having done something bad — like talking about you behind your back — their behavior changes from the normal baseline." The better you know them, the easier it'll be to pick up on these subtle shifts.

If everyone seems nervous when you enter the room, there's likely a good reason for it. For example, "when you come into a room/space and the people there are speaking softly and suddenly become quiet ... it's a good bet you were the topic of conversation just before you arrived, and [it's possible] the talk wasn't good," psychotherapist Toni Coleman, LCSW, CMC, tells Bustle.

While you might not want to do so immediately, it may be a good idea to talk to the person about it — especially if you have to see them everyday, or they're important to you. Moments like these can be awkward, but they can be dealt with in a mature way.

Want to test your hunch? "Try engaging the person ... in conversation and pay attention to how they respond," Coleman says. "Do they continue to look uncomfortable, is their behavior towards you uncharacteristic in some way, or do they try to end [or] change the conversation quickly, looking to the others as they do so?"

If you notice any of these behaviors, "they [may be] communicating nonverbally that they are withholding something, are uncomfortable with you, and want to avoid interacting with you," Coleman says. And that can tell you a lot.

Even though no one's actually in danger, Wood says it's possible the gossiper might react with a fear response upon seeing you enter the room. "They may show their fear in one or more of [their] limbic systems," Wood says, which kick in in "response to danger." It's the whole fight-or-flight reaction, so you might see their eyes widen, they might freeze, or they may even try to quickly leave. But remember, just because someone visibly freezes as if they were caught doesn’t necessarily mean they were saying anything bad. Hey, they could be planning a surprise birthday party!

The person may also get a bit stiff, all thanks to the awkwardness they caused in the room. They "may stiffly smile and say hello," Wood says. "They may cut off the normal greeting or extend the length of it." Whatever it is, they might suddenly seem incredibly inauthentic. Keep in mind, though, that people have more than one reason to act this way. If someone has social anxiety, for example, they might come off as stiff, so it's important not to jump to conclusions or assume the worst.

If they are acting far more friendly than usual, that’s definitely a sign that something is up, as Traci Brown, a body language expert and author of Persuasion Point, explains to Bustle. When someone's caught doing something wrong, or they aren't sure what to do next, they might try to overcompensate. "They may extend a handshake, a hug, or extend the time they say your name, all in an effort to ... cover over the bad things they said,” Wood notes. However, it’s also important to remember that they might not necessarily be saying anything bad about you. For example, they may be expressing concern or worry about you to someone else, hence why they are being more friendly than usual.

If you suspect someone may have been talking behind your back, consider their history. "Do they gossip about [others]? Do they share secrets about other people with you? Don't assume that you're exempt to their gossiping," Boquin says. "People repeat patterns. If they're known to bad-mouth others, chances are they [might be] bad-mouthing you, too." If someone has a history of being a bit disingenuous or gossipy in a hurtful way, consider separating yourself from that person. No one needs that energy in their life.

Pay attention to the person's eye contact. Are they looking away? Looking shiftily towards others? Or staring at you longer than they normally would?

If they were just gossiping, they may "fear being discovered and shut off or reduce the length of eye contact," Wood says. They might also do the overcompensation thing and stare you down longer than they normally would. Or you might notice they look more to others — in a nervous way — to try and assess the situation. Basically, if their eye contact seems different for them, it may be a sign that something's up.

If their toes are pointing toward an exit, "they may [be symbolically running] from the room by pointing their feet away from you and towards the door," Wood says. In general, feet pointing toward an exit indicate — either consciously or subconsciously — that a person’s brain is processing an escape route. This is something people subconsciously do when they want to leave a room. And it may be exactly what they’re trying to do if you just caught them gossiping.

Another clue to look for is closed-off body language, which is something people naturally do when they feel nervous or defensive. "They may shut down by crossing their arms, legs, or ankles or shutting their mouth," Wood says. "They may also show their anxiety [by] covering the mouth, adjusting clothing or jewelry, or adjusting their stance or seated position repeatedly."

It’s important to keep in mind, though, that this body language could be in response to them being uncomfortable around you for myriad reasons, not solely because they are talking behind your back.

Closed-off body language is one thing, but someone who was talking behind your back might even be more overt than that when they see you. “They may just flat out turn their back to you,” Brown says. If someone is actively turning their back to you or facing the other way when you are near or walk into a room, it’s a pretty clear indication that they don’t want to interact with you, whatever the reason. If you find it happening quite a lot, try talking to them about it and say that it’s making you feel a bit unwelcome.

Another behavior to look out for is fidgeting, and specifically self-soothing behaviors in someone else. You probably have a nervous habit or two that you do when you’re put in a stressful situation, such as twiddling a strand of hair or bouncing your knee up and down.

"When someone is uncomfortable around you, they might start engaging in self-soothing behaviors," Adina Mahalli, MSW, a certified mental health and relationship expert, previously told Bustle. "This could even be a subconscious reaction, but things like playing with an earring, fidgeting, or neck rubbing” are signs that someone is uncomfortable, say, from being face to face with someone they were just talking about behind their back.

It’s hard to describe, but you know it when you see it. If you get the sense that someone is flustered or people disperse when you walk into a room, then something might be up. “There's a certain way that people behave — it's called a baseline — and you're looking for shifts on that, either of an individual or of a group,” Brown says. “For instance, if all of a sudden when you walk up people kind of scramble a little bit, then that is a sign as well.” If you notice something out of the ordinary, such as people quickly moving around, your instinct is probably correct in identifying that something is going on.

Especially in a group setting, you can tell if there is a vibe shift based on body language. “You may see things that start to go on with non-inclusive behavior,” Brown says. “In a group, people will stand or sit in a certain way to include people. They'll make a space for you or not.”

If you suspect there are multiple people who are talking behind your back, you might be able to see who is leading the pack, so to speak, simply by the way people position themselves in a group. “They may tell you who's important in the group by the way they cross their legs,” Brown says. “They'll cross their legs towards the leader of the group, the unconscious leader of the group.”

Not everyone's an expert when it comes to reading body language, or even correctly assessing a social situation. So the most important thing to do is trust your gut.

"The reality is they may never admit to talking behind your back, but you can begin to trust your instincts more about the person when you start paying attention," Boquin says. "How does your body feel when you're around this person? Have you begun to tense up or feel anxious around them? What is their body language telling you?" If something feels strange — and especially if it feels strange frequently — it's OK to follow up.