Prepared by the Couples TLC Editorial Team | Clinically reviewed by Jack S. Gershfeld, LMFT
There is a particular kind of person who arrives in a therapy office having already seen four other specialists. She has had the bloodwork, the cardiac workup, the endoscopy. Her thyroid is fine. Her heart is structurally perfect. The gastroenterologist used the phrase “functional,” which she understood, correctly, to mean we cannot find anything. And still: the chest tightness at four in the afternoon, the jaw that aches on waking, the stomach that turns over on Sunday nights, the fatigue that eight hours of sleep does not touch.
She usually opens with an apology. She says some version of I know this is probably just stress.
That word ‘just’ is where the misunderstanding lives. The physical symptoms of chronic stress and anxiety are not a lesser category of real. They are the record of a nervous system that has been running a threat response for months or years without a reliable signal that the threat has passed. The body is not malfunctioning. It is doing precisely what it was built to do, for longer than it was built to do it.
What the Threat Response Actually Costs
The acute stress response is elegant. Perceived danger triggers a cascade; sympathetic nervous system activation, adrenaline, cortisol, that redistributes the body’s resources toward immediate survival. Heart rate climbs. Blood moves toward large muscle groups and away from digestion. Muscles tense in anticipation of impact. Attention narrows and sharpens. Immune function shifts toward the inflammatory response that would serve a wound.
Every one of those adaptations is expensive, and every one of them was designed to be temporary. Run the system continuously and the same adaptations become symptoms. Sustained muscular bracing becomes tension headaches, jaw pain, the shoulders that live somewhere near the ears. Chronically suppressed digestion becomes nausea, reflux, irritable bowel patterns, appetite that vanishes or will not quit. Persistent cardiovascular activation becomes palpitations, chest tightness, the sense that you cannot draw a full breath. Ongoing inflammatory signaling becomes diffuse aching, susceptibility to every virus in the building, and the flattened, leaden fatigue that people describe as feeling like they are moving through water.
The list is long and it is not exotic: dizziness, tinnitus, tingling in the hands, temperature dysregulation, teeth grinding, skin flares, cycles that go irregular, a libido that quietly departs. What unifies these is not a single organ system. It is a single physiological posture, held too long.
One necessary caveat, and it is not a formality. Every symptom named above can also be produced by conditions that require medical treatment; thyroid disease, anemia, cardiac arrhythmia, autoimmune illness, sleep apnea, vitamin deficiencies, medication effects. “It’s probably anxiety” is a conclusion to reach after an appropriate workup, never instead of one. Good psychological care and good medical care are not competitors. If you have not had these symptoms evaluated by a physician, that is the first move, not the last resort.
Why the Symptoms Persist After the Crisis Ends
Here is the part that confuses people most. The deadline passed. The restructure was announced. The difficult year ended. And the body did not get the memo.
Threat responses do not switch off on the basis of information. They switch off on the basis of felt safety, which is a different thing, arriving through a different channel. You can know intellectually that you are not in danger while your physiology continues to run the alarm, and the gap between those two facts is the territory where most chronic anxiety symptoms live. This is why insight alone so often fails to produce relief, and why so many capable, self-aware people can explain their anxiety with real precision while remaining entirely unable to shift it.
The nervous system is asking a question that analysis cannot answer. The question is not is this situation objectively dangerous? It is closer to am I alone with this?
The Finding That Reframes the Whole Problem
In 2006, the psychologist James Coan and his colleagues put married women into an fMRI scanner and threatened them with mild electric shocks under three conditions: alone, holding a stranger’s hand, and holding their husband’s hand. The threat-related activation across the brain; regions including the hypothalamus, the anterior insula, and the dorsolateral prefrontal cortex, was highest when the women faced the threat alone. A stranger’s hand helped somewhat. A partner’s hand helped considerably more, and it helped most in the relationships the women rated as highest in quality.
The implication is not sentimental. It is metabolic. Coan and Lane Beckes developed this into what they called social baseline theory: the human brain’s default assumption is proximity to reliable others, and it budgets its regulatory resources accordingly. Self-regulation; the effortful prefrontal work of managing your own distress, is computationally and metabolically costly. When trustworthy support is present, the brain can offload some of that cost. Coan calls this load sharing. When support is absent or unreliable, the brain runs the expensive process continuously, at your expense.
Which is to say: the physical symptoms of chronic stress and anxiety are, in significant part, the bill for regulating alone.
That reframes matters clinically. In 2013, Susan Johnson, the primary developer of Emotionally Focused Therapy, ran the handholding paradigm as a pre/post therapy study with 24 distressed couples, publishing the results in PLOS ONE. Couples entered with moderate relationship distress and completed an average of roughly 23 sessions of EFT. Afterward, threat-related activity during partner handholding had measurably decreased in regions including the dorsal anterior cingulate cortex and the right dorsolateral prefrontal cortex. The effect was strongest for the couples who had started out most distressed. Therapy had not taught these women a better breathing technique. It had changed what their brains did with a threat cue when someone they trusted was holding their hand.
There was an unexpected finding, too, and it is worth sitting with: threat-related activity in some of those same regions increased slightly during the alone condition after therapy. Deepening your reliance on others appears to make solitude in the face of threat somewhat harder to tolerate. That is not a flaw in the finding. It is a fair description of what secure attachment actually is.
Three Faces of the Same Physiology
The clinical presentations that bring people to treatment tend to look like separate problems. They are more usefully understood as different arrangements of the same underlying dysregulation.
High-functioning anxiety is chronic threat response paired with high performance. The work gets done, often exceptionally. Nobody at the office would guess. The cost is entirely internal and entirely physical; the tension, the gut, the sleep, the exhaustion that arrives on the first day of vacation when the system finally stands down and discovers how depleted it is. People in this pattern are often the last to seek help, because the standard by which they judge whether something is wrong is functioning, and they are functioning. If this describes you, the specific question of what a CBT therapist for high-functioning anxiety actually does, and where cognitive work runs out of road is worth its own reading.
Burnout is what happens when the threat response has been running so long in one domain that the system gives up on mobilization entirely and switches strategy. The signature is not agitation but its opposite: emotional deadening, cynicism about work that once mattered, and a bone-level exhaustion that rest does not repair. It is not a character failure or a stamina problem, and treating it as one reliably makes it worse. Therapy for career burnout and work stress is a different project from anxiety treatment, and confusing the two costs people years.
Panic is the same physiology arriving all at once instead of gradually. A panic attack is the full threat cascade; surging heart rate, air hunger, dizziness, derealization, the certainty of imminent catastrophe, compressed into minutes and, crucially, occurring without an identifiable external trigger. The body is responding accurately to an alarm that has fired spuriously. Because panic is so overwhelmingly physical, body-based approaches often reach it more effectively than talk alone; if you are searching for somatic therapy for panic attacks near you, you are following a sound instinct.
And then there is the fourth face, the one almost everyone with the other three reports: the mind that will not stop at night. The horizontal hours when the day’s threat signals, unaddressed, finally have the floor. Learning how to stop overthinking before going to sleep is not a matter of willpower or sleep hygiene checklists; it is a matter of understanding what rumination is doing for you and offering the system something that works better.
What Actually Helps
Three things, working together, and the order matters less than the combination.
Down-regulate the body directly. The nervous system does not respond to argument, but it responds reliably to input; extended exhalation, which recruits parasympathetic activity through the vagus nerve; sustained rhythmic movement; deliberate discharge of the muscular bracing that has become invisible through habituation; consistent sleep and light exposure that stabilize circadian signaling. This is not a substitute for psychological work. It is the floor that makes psychological work possible, because a system in full alarm cannot do much reflecting.
Change your relationship to the thinking. Cognitive approaches earn their evidence base here. Learning to catch a catastrophic prediction, test it against evidence, and decline to chase it is a real skill with real returns, particularly for the anticipatory dread that keeps threat physiology idling. The honest limit is that cognitive change and physiological change are not the same event, and plenty of people become expert at identifying their distortions while their bodies carry on exactly as before.
Address the isolation. This is the piece most commonly skipped, and the research suggests it may be the piece that does the most. If chronic symptoms partly represent the cost of regulating alone, then the intervention is not only better solo coping but access to responsive connection; a partner who can be reached emotionally, a therapist who functions as a genuine secure base, a friendship where you are not performing competence. Johnson’s model of Emotionally Focused Therapy has thirty-plus years of outcome research behind it, including a 1999 meta-analysis reporting a large effect size and 70–73% of couples no longer distressed at termination, and a comprehensive 2024 meta-analysis by Spengler and colleagues confirming medium-to-large effects with gains holding at two years. A 2025 randomized controlled trial published in Psychotherapy extended the model to individual work, finding significant reductions in depression, anxiety, and general symptom distress across fifteen sessions.
That last study matters for anyone reading this without a partner. The regulatory benefit of secure connection is not restricted to romantic relationships. What the nervous system needs is a reliable other and that can be built.
The Reframe Worth Keeping
The symptoms are not imaginary, they are not a weakness, and they are not evidence that you are broken. They are an accurate readout from a system that has been carrying something heavy without enough help, for longer than anyone should.
Bodies are not stoic. They keep records. The good news buried in that fact is that the record changes when the conditions change and the conditions include, more than most people have been told, whether you are facing the threat alone.
Frequently Asked Questions
What are the physical symptoms of chronic stress and anxiety?
Physical symptoms of chronic stress and anxiety can include muscle tension, headaches, jaw pain, nausea, reflux, digestive changes, heart palpitations, chest tightness, difficulty taking a full breath, dizziness, tingling, teeth grinding, fatigue, and changes in sleep. Because many medical conditions can cause similar symptoms, persistent or concerning symptoms should be evaluated by a physician.
Why does chronic stress cause so many physical symptoms?
Chronic stress keeps the body’s threat-response systems activated longer than they were designed to be. Heart rate increases, muscles remain tense, digestion changes, attention narrows, and inflammatory processes can shift. When these temporary survival responses become persistent, they can begin showing up as physical symptoms.
Can chronic anxiety cause physical symptoms even when I don’t feel anxious?
Yes. Anxiety can produce physical symptoms such as muscle tension, digestive problems, fatigue, and heart palpitations even when someone does not consciously feel anxious. This can be especially common when a person has become accustomed to suppressing, overriding, or disconnecting from emotional signals.
How do I know whether my physical symptoms are caused by anxiety or something medical?
You cannot reliably determine that from symptoms alone because anxiety can produce symptoms that overlap with medical conditions. Thyroid disease, anemia, heart rhythm problems, autoimmune conditions, sleep apnea, vitamin deficiencies, and medication effects can cause similar symptoms. Persistent physical symptoms should be medically evaluated before assuming anxiety is the cause.
Why do physical stress symptoms continue after the stressful situation is over?
Physical stress symptoms can continue because the nervous system does not always return to a calm state simply because you intellectually know the stressful situation has ended. Your mind may recognize that the threat is gone while your body continues operating as though it still needs to remain alert.
What are the physical symptoms of high-functioning anxiety?
High-functioning anxiety can involve muscle tension, digestive problems, sleep difficulties, persistent exhaustion, and feeling physically depleted despite continuing to perform well at work or in daily life. Some people notice the exhaustion most strongly when they finally stop working or take time off.
Can career burnout and work stress cause physical symptoms?
Yes. Prolonged career stress can contribute to severe exhaustion, emotional deadening, reduced motivation, and cynicism toward work that previously felt meaningful. Burnout can develop when stress has continued so long that maintaining the same level of physical and emotional activation becomes increasingly difficult.
Can somatic therapy help with panic attacks?
Somatic approaches may help address the intense physical experience associated with panic attacks by working directly with bodily sensations and physiological activation. Panic can involve a racing heart, difficulty breathing, dizziness, derealization, and a powerful sense that something catastrophic is happening, making body-based approaches particularly relevant.
Why do I overthink when I’m trying to sleep?
Overthinking can become more noticeable at night because the distractions and demands of the day are gone, leaving unresolved worries and threat signals more room to surface. Nighttime rumination may function as an attempt to anticipate problems, regain control, or mentally resolve concerns that were not processed during the day.
What helps with the physical symptoms of chronic stress and anxiety?
Helpful approaches can include directly calming physiological activation, changing the way you respond to anxious thoughts, and developing reliable emotional connection with other people. Extended exhalation, rhythmic movement, releasing muscular tension, consistent sleep and light exposure, cognitive techniques, therapy, and supportive relationships can all play different roles in regulating chronic stress.
Can therapy help with physical symptoms caused by chronic stress and anxiety?
Yes. Therapy can address thought patterns, physiological regulation, emotional experiences, and relational factors that contribute to chronic stress and anxiety. Cognitive approaches can help change responses to catastrophic thinking, while body-based regulation and secure emotional connection can address other parts of the stress response that cognitive insight alone may not resolve.