The Scientific Reasons Behind These 8 Super Annoying Habits

Why does your coworker constantly clear his throat? What’s behind your best friend’s Facebook oversharing? The answers go a lot deeper than just "to be annoying."

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Constantly clearing throat

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Ahem, ahem! Someone who constantly clears his or her throat could have a nose and sinus problem, called chronic rhinitis, which results in excessive mucus production. It occurs when an irritant (typically allergies) inflames the membrane in the upper respiratory tract. The type of mucus you have can reveal a lot about your health. People with year-round allergies, like house dust mites, may have a constant build-up of mucus in their throat, which leads to that non-stop clearing. It can usually be treated with a few weeks of a strong anti-allergy medication. Another potential cause: acid reflux. When acid passes from the stomach upward into the esophagus, the throat swells. Mucus sticks to the swollen tissues, causing hoarseness and a cough. If home remedies for heartburn or over-the-counter heartburn medications don't resolve the issue, a doctor may be able to prescribe stronger treatment.

Always saying, "you know" or "like"

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There's always, like, one not-so-brilliant movie character who talks this way, you know? While those sort of people may not intentionally want to ruin your day with the most annoying phrases in the English language, don't write off their intelligence: Research suggests that those who often say "like" and "you know" may be especially thoughtful. In a study published in the Journal of Language and Social Psychology, researchers examined more than 260 transcriptions of normal conversations. They discovered people who used these "filler words" tend to be more conscientious than people who don't. Researchers say discourse markers imply a desire to thoughtfully share opinions with others and may give someone more time to phrase something just right.

Oversharing on Facebook

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A minute into checking social media, you find out your high school lab partner is potty training her 6-week-old Labradoodle puppy ... unsuccessfully. You may roll your eyes when you get too much detail, but these oversharers reap a neurological reward when they spill their TMI news. Harvard researchers used an MRI machine to track 212 participants' brain activity as they answered questions about their own opinions or others' opinions. Researchers found that talking about oneself activates brain regions associated with reward (the nucleus accumbens and the ventral tegmental area). Only about 60 percent of real-life conversations typically revolve around an individual's personal thoughts and stories, compared to 80 percent of social media communication. Unfortunately, that doesn't make those posts any less annoying, so be mindful for your followers' sake. These are the signs you're the one sharing too much on Facebook.

Biting nails

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Distracted by a pal who just can't sit still? Perfectionism may be an underlying cause of nail biting, skin picking, or eyelash pulling, according to a study published in the Journal of Behavior Therapy and Experimental Psychiatry. Researchers asked 48 participants questions about how often they experienced certain emotions, including boredom, anger, and anxiety, and put them in situations meant to trigger feelings such as boredom or relaxation. People with fidgety habits reported greater urges to pick at themselves when bored compared to when in relaxing scenarios. Researchers say perfectionists are more likely than others to become bored easily, and that behaviors like picking at nails deliver a form of reward in unsatisfying situations. Perfectionism can come with more serious consequences, though—here's how your perfectionist habits could be ruining your life.

Complaining about ailments

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It may be tiresome to comfort a hypochondriac (they have a sore stomach on Monday, a swollen lymph node on Tuesday, an achy back on Wednesday) but your pal could truly believe these abnormalities are serious. This condition may be a sign of what medical experts call illness anxiety disorder (IAD), which involves excessive worry about contracting a serious illness even when no (or only mild) symptoms are present. Even doctors usually cannot calm an affected person's fears. Those with IAD may also exhibit these anxiety disorder symptoms. Though it's uncertain what causes IAD, people with major life stress, a history of childhood abuse, or another mental disorder such as depression are at higher risk. The disorder typically appears between the ages of 25 to 35; therapy and certain antidepressant or antianxiety medications may help treat IAD.

An ear-shattering sneeze

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Know someone with a trumpeting sneeze? Blame their anatomy. Irritants, such as bright light or an allergen, stimulate the nasal cavity's trigeminal nerve and trigger a coordinated reflex from the diaphragm to the brain. Many different muscles are involved in building the pressure needed to expel the irritant via a sneeze. Individual differences in anatomy such as abdominal strength, trachea size, and lung volume may cause some sneezers to be especially loud; others may naturally use more muscles in sneezing. (Here's the science behind why everyone sneezes differently.) Suspect this is you? When you feel a sneeze coming, put your index finger at the base of your nose and slightly push up. This will reduce the severity of a sneeze, or perhaps even completely suppress it.

Aggressive driving

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Do you know which type of anger you have? Road ragers may be prone to making themselves highly visible in ways other than aggressive driving. In a Colorado State University study, researchers found that drivers of cars with window decals, personalized license plates, and bumper stickers are far more likely than those without personalized cars to use their vehicles to express rage, such as by tailgating or honking. Researchers say both road rage and car markers are signs of territorialism, and that the more markers a car has, the more aggressively someone drives when provoked. The effect remained whether the messages were, for example, "Visualize World Peace," or "My Kid Beat Up Your Honor Student." Territorial people see a car as an extension of themselves, and have a difficult time viewing public property differently from private property ("our road" is "my road" in their minds).

Talking way too fast

speakergaretsworkshop/ShutterstockYou’re sure your friend is destined to be a cattle auctioneer. Why else would he be able to ramble on at the speed of light? From what researchers know about exceptionally rapid speech (ERS), fast talking could be the result of a speech disorder called cluttering. Those with the disorder (called clutterers) speak quickly, have abnormal intonation, overuse fillers, and pause mid-speech in places that don’t make sense. For fast-talkers without the other cluttering symptoms, their brains may have the power to exceed normal fluency demands. Regardless of what causes your friend’s rapid-fire speech, it’s not necessarily a bad thing. One study found that fast-talkers are more persuasive than us normal-talking folks. But that doesn't mean you are exempt from all speech-related quirks. These are the six annoying talking habits you have, according to science.

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