Health
The real reason for nail-biting and other ‘bad habits,’ according to psychologists
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Nail-biting, procrastination and avoidance are often framed as bad habits we can’t control, but a new psychology book argues that they’re more like survival strategies that may have once protected us.
In “Controlled Explosions in Mental Health,” clinical psychologist Dr. Charlie Heriot-Maitland examined why people stick with bad habits that seem to work against their own best interest.
Drawing on years of clinical research and therapeutic practice, the expert reveals how the brain prioritizes predictability and safety over comfort and happiness.
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“Our brain is a survival machine,” he told Fox News Digital. “It is programmed not to optimize our happiness and well-being, but to keep us alive.”
For much of human history, being caught off-guard could be fatal, research shows. “The brain prefers predictable pain over unpredictable threat,” Heriot-Maitland said. “It does not like surprises.”
Experts say the brain prioritizes predictability and safety over happiness, preferring controlled, familiar discomfort to unpredictable risk. (iStock)
When faced with uncertainty, the brain may opt for smaller, self-sabotaging behaviors rather than risking larger, unpredictable ones.
The book argues that “the brain uses these small harms as a protective dose to prevent further harms.” Procrastination, for example, may create stress and frustration, but it can also delay exposure to the higher-stakes fear of failure or judgment.
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“The central argument is that behaviors we label as ‘self‑sabotaging’ could actually be attempts by the brain to control discomfort,” Thea Gallagher, a psychologist and wellness programs director at NYU Langone Health, told Fox News Digital.
In modern life, threats are often more emotional than physical. Rejection, shame, anxiety and loss of control can activate the same survival systems as a physical threat, experts say.
What looks like self-sabotage is often a way to delay or soften exposure to feared outcomes such as failure, judgment or rejection, an expert said. (iStock)
“Our brains have evolved to favor perceiving threat, even when there isn’t one, in order to elicit a protective response in us,” Heriot-Maitland said.
Self-criticism, avoidance and actions like nail-biting can function as attempts to manage the “dangers.”
Potential limitations
Gallagher noted that the book leans on clinical insight rather than empirical research.
“That doesn’t make it wrong, but it means the claims are more interpretive than scientific,” she said, noting that more data is needed to determine what is happening on a “mechanistic level.”
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Gallagher also emphasized that external factors, such as ADHD, trauma, chronic stress or socioeconomic pressures, can shape these behaviors in ways that aren’t just about threat responses.
Long-term improvement comes from building safety, observing patterns with curiosity, and gradually tolerating uncertainty rather than fighting or appeasing the behavior, an expert advised. (iStock)
Rather than seeing patterns like procrastination as flaws, the book encourages people to understand their protective function. That said, people should seek professional support for destructive behaviors that could cause severe distress or self-harm.
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“I encourage my patients to think about short-term pain for long-term gain, because if you just respond to discomfort and distress in the moment, you might find yourself in longer-term patterns you don’t like or want,” Gallagher said.
“I don’t think it explains the motivations for all people, as everyone is different, but I think it can certainly apply to some.”
“Our brain is a survival machine.”
Heriot-Maitland noted that everyone has a choice in how they handle their own potentially harmful habits.
“We don’t want to fight these behaviors, but nor do we want to appease them and let them carry on controlling, dictating and sabotaging our lives,” he said.
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Gallagher shared the following practical tips for people who may notice these patterns.
No. 1: Shift from self‑judgment to self-compassion
Instead of asking yourself “Why am I like this?” try focusing on the function of the behavior, she advised. For example, does it serve to soothe, numb or distract from other fears or threats?
Understanding the protective function of “bad” behaviors can reduce shame and open the door to more effective change, without excusing harm. (iStock)
No. 2: Notice patterns without fighting them (initially)
“Observing the behavior with curiosity helps weaken the automatic threat response,” Gallagher said.
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No. 3: Build a sense of safety
This can mean relying on grounding techniques, supportive relationships, predictable routines and self‑soothing practices.
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No. 4: Practice small, low‑stakes exposure to feared situations
“If the brain fears uncertainty, gently introducing controlled uncertainty can help retrain it,” the expert recommended.
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Research continues to uncover new details on how fasting may help extend life.
A new study published in the journal Nature Communications investigated how intermittent fasting can boost longevity in small worms often used in aging research.
Researchers from the University of Texas Southwestern Medical Center in Dallas compared worms that were fed normally to those that underwent a 24-hour fast in early adulthood and were then fed again, according to a press release.
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The scientists measured a variety of factors, including stored fat, gene activity related to fat metabolism and lifespan.
The results showed that the life-boosting benefit did not depend on the fasting itself but on the body’s behavior after eating again.
Experts say sustainability is key when choosing a long-term weight-loss strategy. (iStock)
Study lead Peter Douglas, associate professor of molecular biology and a member of the Hamon Center for Regenerative Science and Medicine at UT Southwestern, suggested that these discoveries “shift the focus toward a neglected side of the metabolic coin – the re-feeding phase.”
“Our data suggest that the health-promoting effects of intermittent fasting are not merely a product of the fast itself, but are dependent on how the metabolic machinery recalibrates during the subsequent transition back to a fed state,” he said.
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“Our findings bridge a gap between lipid metabolism and aging research,” he added. “By targeting aging, the single greatest risk factor for human disease, we move beyond treating isolated conditions toward a preventive model of medicine that enhances quality of life for all individuals.”
Lauri Wright, director of nutrition programs at the University of South Florida’s College of Public Health, called this a “high-quality” study that adds an “important nuance to how we think about fasting and longevity.”
Intermittent fasting typically involves limiting meals to an eight-hour daily window or fasting every other day. (iStock)
The benefits of the refeeding phase after fasting were “especially interesting,” Wright, who was not involved in the study, told Fox News Digital.
“The researchers showed that longevity was linked to the body’s ability to turn off fat breakdown after fasting, allowing cells to restore energy balance,” she reiterated.
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“From a scientific standpoint, that’s a meaningful shift because it suggests fasting is not just about burning fat, but about metabolic flexibility.”
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Fasting may support longevity through triggering metabolic switching, enhancing cellular repair and stress resistance and improving markers like insulin sensitivity, research shows.
Limitations and cautions
Although this study provides “important insight” on the power of refeeding, Wright noted that the findings should be approached with caution, as the study was done on worms and cannot always be translated to humans.
“Additionally, it explains how a process might work in a controlled lab condition rather than real-world eating behaviors,” she added as a limitation. “Finally, the study is short-term and doesn’t give us the long-term translation on lifespan outcomes.”
The review found intermittent fasting was barely more effective than doing nothing, according to the study authors. (iStock)
Wright cautioned that fasting is “not a magic solution for longevity, and how you eat overall matters more than when you eat.”
“I advise, first and foremost, to focus on diet quality, including a variety of fruits and vegetables, healthy fats and minimally processed foods,” she said.
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For those who are considering fasting, it’s better to stick with a moderate plan — like a 12- to 14-hour overnight fast — rather than going to extremes, Wright said. After fasting, she recommends focusing on well-balanced meals.
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Several groups of people should be cautioned against fasting, according to Wright, including those with diabetes who are on insulin or hypoglycemic medications, those who are pregnant or breastfeeding, anyone with a history of eating disorders and older adults at risk of malnutrition.
Anyone considering intermittent fasting should consult with a doctor before starting.
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More than three million people travel to undergo cosmetic surgery each year, statistics show — but the potential savings come at a cost.
Most people opting to pursue this so-called “medical tourism” are chasing budget-friendly price tags.
International surgeries, such as hair transplants in Turkey, can cost as little as $4,000 to $5,000 compared to $20,000 to $30,000 in the U.S., but often come with extreme risks, according to board-certified plastic surgeon Dr. Sheila Nazarian of California.
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The doctor recently joined Lisa Brady on the “The FOX News Rundown” podcast to discuss the rising trend of medical tourism. One of the biggest risks, she said, is the lack of safety regulations in popular destinations like Mexico and Turkey.
As demand spikes in these medical tourism “mills,” there have been reports of non-medically trained staff performing procedures like hair transplants.
Most people opting to pursue “medical tourism” are chasing budget-friendly price tags. (iStock)
“I’ve heard that they [international clinics] are even recruiting people who maybe were taxi drivers and then putting them through their own training program … to become hair transplant technicians,” Nazarian said. “That’s how high the demand has become.”
In the U.S., medical school graduates are granted a “physician and surgeon” license, which means doctors — including pediatricians or OB-GYNs — can legally perform cosmetic surgeries, even if they didn’t receive specialized training for those procedures during residency, Nazarian noted.
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Instead of pinching pennies, the doctor recommended paying whatever amount is necessary to ensure quality treatment.
“People think of it as, you know, going to the mall. … It’s surgery, and surgery has risks,” she said. “You need to be with someone who not only can perform a beautiful surgery, but who can handle possible complications well.”
“You need to ask them: ‘What was your residency training in? And if you wanted to, would you be allowed to do this procedure in a hospital?’”
Aftercare is another critical factor in the success and safety of a cosmetic procedure, as the doctor emphasized that 20% of a surgical result depends on post-operative care.
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This can be difficult or even impossible to manage when a doctor is in a different time zone, she cautioned, or if the clinic disappears shortly after the procedure.
Nazarian also noted the importance of addressing the psychological component of plastic surgery, noting that no procedure will fix underlying unhappiness. The doctor said she uses screening questionnaires to ensure that patients are truly seeking self-improvement rather than a “cure” for deeper issues.
International surgeries, such as hair transplants in Turkey, can cost as little as $4,000 to $5,000 compared to $20,000 to $30,000 in the U.S., but often come with extreme risks. (iStock)
“If you’re not already generally very content with your life, a knife in my hand is not going to bring you there,” Nazarian said.
“The analogy I always give is you don’t want a paisley couch — you want a neutral couch and you can put paisley pillows on it,” she said, noting that a procedure should “make you look normal, God-given, athletic. And then you can change your clothes when the trends come and go.”
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Samuel Golpanian, M.D., a double board-certified plastic surgeon in Beverly Hills, said he has also seen an increasing number of patients undergoing cosmetic procedures abroad, sometimes with “devastating consequences.”
“The key is being extremely careful before embarking on this journey.”
“I’ve seen a wide range of complications, including infections, poor wound healing, significant scarring and tissue necrosis (skin death),” he told Fox News Digital. “These complications often lead to prolonged pain, ongoing medical problems, and significant additional costs to repair the damage.”
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Golpanian said he’s treated patients who received unsafe or non-medical-grade injectable materials, which can lead to serious long-term health issues.
One surgeon said he’s treated patients who received unsafe or non-medical-grade injectable materials, which can lead to serious long-term health issues. (iStock)
“I’ve also seen damage to underlying structures, asymmetry and results that are extremely difficult — sometimes impossible — to correct.”
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“That said, I’ve also seen some good outcomes, so it’s not all bad,” he noted. “The key is being extremely careful before embarking on this journey.”
Quick tips for safe ‘medical tourism’
Fully vet the surgeon. “Most surgeons will provide information about their education and training, but it’s important not to accept these claims at face value,” Golpanian said. “Verify them directly by contacting the institutions where they trained.”
Ask for references from prior patients. Ideally, it’s best to get references from U.S.-based patients who can speak candidly about both their experience and their results, the surgeonsaid.
Think beyond the cost. Golpanian emphasized the adage “you get what you pay for.” “Cost should take a back seat to experience, training, judgment and proven results,” he advised.
Be cautious about relying on before-and-after photos. These can be selective or even enhanced, Golpanian warned.
Keep aftercare in focus. “Make sure the practice emphasizes comprehensive follow-up care and has a clear, realistic post-operative plan in place.”
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