If you are in crisis, this is the only part of this page that matters
If you are having thoughts of suicide or self-harm, call or text 9-8-8. The 988 Suicide Crisis Helpline runs 24 hours a day, 7 days a week, free, in both Canada and the United States. In Canada it is bilingual, and calls from Quebec are routed to Quebec services. In a life-threatening situation, call 911.
Please do not spend the next hour reading about hormones instead. Nothing here is urgent and that call is. Come back afterwards if you want to.
What else feels exactly like anxiety?
Several things, and one of them is common, treatable, and found with a single blood test. This section comes first because the reader who needs it is the reader least likely to scroll. Anxiety is real, it is the most likely explanation for anxious symptoms, and it deserves treatment. It is also the explanation that gets reached for early and then never revisited, which is precisely what makes the alternatives dangerous.
Call 911 now, and do not talk yourself out of it
Call emergency services if you have any of these, whether or not you also have an anxiety diagnosis:
- Chest pain, pressure, squeezing or fullness, or discomfort spreading to the arms, back, neck, jaw or stomach.
- Shortness of breath, with or without chest discomfort.
- A cold sweat, nausea, lightheadedness, or unusual tiredness or weakness.
- Sudden breathlessness, especially with surgery, a long flight, a stretch of immobility, pregnancy or the weeks after birth, cancer, a previous clot, or estrogen, whether that is contraception or menopausal hormone therapy. That can be a clot in the lung, and it is routinely mistaken for a panic attack. About 30% of these clots happen with no risk factor at all (StatPearls), so having none of the above is not a reason to wait.
- A high fever with a very fast heart rate in someone with thyroid disease. Cleveland Clinic calls that a possible thyroid storm and says to get to the nearest hospital.
- Sudden face droop, weakness or numbness down one side, slurred or garbled speech, sudden confusion, sudden loss of vision, or a sudden worst-ever headache. That is a stroke or TIA, not a panic attack, even if it passes in minutes, and even if you feel frightened while it happens. Note the time the symptoms started and call 911. Treatment is on a clock, and a TIA that clears on its own is a warning of a stroke that may not.
Five things the absence of a symptom does not do for you. A red flag is only useful when it is present:
- No chest pain does not rule out a heart attack, and feeling anxious is not evidence against one. Chest discomfort is still the most common symptom in women, as in men. But the American Heart Association lists anxiety itself, along with shortness of breath, upset stomach, shoulder, back or arm pain, and unusual tiredness or weakness, among the symptoms women get that are "typically less associated with heart attack", and warns that women often put them down to reflux, flu or normal ageing. Anxiety is on the heart attack list. It is not a way off it.
- A normal ECG in a clinic does not rule out an arrhythmia. The common one here, paroxysmal supraventricular tachycardia, comes and goes. A tracing taken while you feel fine is expected to look fine. Ask about an ambulatory monitor that records over days.
- A normal weight does not rule out a thyroid problem. Weight loss is the classic sign, not a required one. In older adults an overactive thyroid can present as apathy and exhaustion instead. The blood test is the only thing that rules it out, and it is one tube.
- Having no risk factor does not rule out a clot. Around 30% of pulmonary embolisms are unprovoked. The risk-factor list raises your odds. It does not gate the diagnosis.
- Having a genuine anxiety disorder does not protect you from any of this. It makes it harder to find. It is the single biggest reason the conditions below get missed.
What to say, because the words decide the workup. Describe the symptom, not the label. Say "I have chest pain" or "I cannot get my breath." Do not open with "I think I'm having a panic attack," because the label you hand over is the one that gets written down, and it is the one that closes the question.
Here is the differential a clinician runs, and what separates each item from anxiety. StatPearls lists hyperthyroidism, pheochromocytoma, chronic obstructive pulmonary disease, transient ischemic attack, epilepsy and bipolar disorder in the differential diagnosis for generalized anxiety disorder, and names caffeine, decongestants and albuterol as substances that produce the same picture. Its recommended workup is thyroid function tests, blood glucose, echocardiography and a toxicology screen. StatPearls' separate entry on panic disorder adds angina, asthma, congestive heart failure, mitral valve prolapse and pulmonary embolism to the differential. That is not an exotic list. It is a normal first appointment, and many people never get it.
| What it can be | What overlaps with anxiety | The sign that separates it | How it is found |
|---|---|---|---|
| Hyperthyroidism | Racing heart, tremor, irritability, restlessness, broken sleep, genuine anxiety | Heat intolerance, sweating, and weight loss despite a normal or bigger appetite point hard at the thyroid. But Cleveland Clinic notes you may have some of these and not others, and in older adults an overactive thyroid often shows up as apathy, fatigue and low mood with none of the classic signs. A stable weight does not rule it out. Only the blood test does | A blood test. Cleveland Clinic: T3 and T4 above normal, TSH usually (not always) below. A low TSH with normal T3 and T4 is subclinical hyperthyroidism, still worth acting on |
| Paroxysmal supraventricular tachycardia (an arrhythmia) | Sudden pounding heart, breathlessness, dread | It switches on and off abruptly, and the rate is very fast and regular. Panic tends to build and ebb | An ECG during an episode, or a multi-day ambulatory monitor |
| Heart attack | Chest tightness, breathlessness, sweating, nausea, a sense of doom | There may be no reliable distinguishing sign at all. Pain spreading to the jaw, neck, back or arm, and a cold sweat, point at the heart | 911. This is not a decision to make at home |
| Stroke or TIA | Dizziness, tingling or numbness, derealisation, breathlessness, a sense of doom | The symptoms are one-sided or focal. Panic tingling is usually symmetrical, both hands, or around the mouth. Face droop, one-sided weakness, or trouble producing or understanding speech is never panic. It clearing up on its own does not make it safe | 911, and note the time it started. StatPearls lists transient ischemic attack in the anxiety differential |
| Pulmonary embolism (a clot in the lung) | Sudden breathlessness, fast heart, chest pain, a sense of doom | Breathlessness out of proportion to what you are doing, sometimes with calf pain or swelling. Surgery, immobility, pregnancy, cancer, a previous clot, and estrogen, in contraception or in menopausal hormone therapy, raise the odds. None of them is required: about 30% of clots are unprovoked | Emergency department imaging |
| Asthma attack | Breathlessness, chest tightness, fast breathing, fear, a feeling of not getting enough air | Wheeze, cough, and a chest that stays tight instead of easing as the fear passes. Breathing exercises will not open an airway. A reliever inhaler will | Take your reliever inhaler. If you cannot speak in full sentences, or the reliever is not working, call 911. StatPearls lists asthma in the differential for panic disorder |
| Pheochromocytoma (a rare adrenal tumour) | Episodic palpitations, sweating, apprehension | Episodes come with a pounding headache and very high blood pressure | Blood and urine tests a doctor orders |
| Low blood sugar | Shakiness, sweating, racing heart, confusion | It resolves within about 15 minutes of fast-acting sugar, and it clusters around missed meals, alcohol, or insulin and other diabetes medication | A blood glucose reading. If you take insulin or a sulfonylurea, treat it now with 15 g of fast sugar, not later. If someone is too confused or drowsy to swallow safely, do not put food in their mouth. Call 911 |
| Alcohol or benzodiazepine withdrawal | Anxiety, tremor, sweating, fast heart, insomnia, agitation | It is timed to the last drink or dose, and it gets worse over the first days rather than better | A doctor, urgently. Read the box below before you do anything |
| Medications and stimulants | Jitteriness, palpitations, insomnia, a wired feeling | It started when the drug did. Corticosteroids, salbutamol inhalers, decongestants, ADHD stimulants, thyroid replacement, caffeine | Review every drug, including inhalers and over-the-counter ones, with a pharmacist or doctor. Reviewing is not stopping. Do not stop or cut back a prescribed inhaler, steroid or thyroid tablet on your own. With a reliever inhaler in particular, cutting back is how a survivable asthma attack becomes a fatal one |
If you drink to take the edge off, do not stop on your own
This is the trap this table sets, so we are going to close it. A reader who recognises alcohol in the row above may decide to quit tomorrow morning. For a heavy daily drinker, that is the dangerous move, not the safe one.
StatPearls describes withdrawal seizures typically 8 to 48 hours after the last drink, and delirium tremens at any point in the first 3 to 5 days after stopping or even just cutting down, with fever, a fast heart, agitation, sweating, hallucinations and disorientation. There is no early window that is safe. Confusion, fever, shaking or hallucinations at any point after your last drink is a 911 call, not a wait-and-see. Its mortality was historically as high as 20%, and is around 1% with prompt treatment. The treatment is what makes the difference, and you cannot give it to yourself. Ask a doctor for a supervised plan, today, and say plainly how much you drink and how often. The same applies to benzodiazepines such as lorazepam or clonazepam: never stop them abruptly without medical supervision.
The same rule covers steroids. Corticosteroids such as prednisone genuinely cause anxiety, agitation and insomnia. That is not a reason to stop taking one. Stopping or reducing a steroid on your own is its own emergency, and it belongs to the doctor who prescribed it. We have written about what happens when you come off steroids and why the taper is not yours to change.
If you have already been told it is anxiety
Then this page is more about you than about anyone else reading it, and here is the evidence for that.
Lessmeier and colleagues surveyed 107 consecutive patients with paroxysmal supraventricular tachycardia, a re-entrant arrhythmia that makes the heart suddenly race. 67% of them met the full DSM-IV criteria for panic disorder. The arrhythmia was unrecognized after the initial medical evaluation in 59 patients, 55% of the group, and stayed unrecognized for a median of 3.3 years. Among those, non-psychiatrist physicians attributed the symptoms to panic, anxiety or stress in 32 of the 59. Women were more likely than men to have their symptoms ascribed to a psychiatric origin: 65% against 32%.
Those patients were not imagining it, and they were not badly informed. They had a fixable heart rhythm problem and a plausible-sounding label, and the label won for a median of three and a half years. If you carry an anxiety diagnosis and your body is doing something new, the diagnosis is the reason to look harder, not the reason to stop looking.
Does anxiety raise cortisol?
In the short term, yes, and the evidence is unusually precise about which kind of stress does it. Dickerson and Kemeny's meta-analysis of 208 laboratory studies tested what actually moves the hormone. Their finding, in their words, is that "motivated performance tasks elicited cortisol responses if they were uncontrollable or characterized by social-evaluative threat (task performance could be negatively judged by others)".
The size of the effect depends almost entirely on whether both elements are present:
- Both social evaluation and uncontrollability (public speaking and timed mental arithmetic in front of a judging audience): d = 0.92. Almost 3 times the effect of either component alone.
- Social evaluation alone: d = 0.35. Uncontrollability alone: d = 0.32.
- Neither (solvable puzzles without a time limit, or passive tasks like watching a film): no significant cortisol response at all, at d = −0.08 and d = −0.07.
The authors state that their findings "contradict the belief that cortisol is responsive to all types of stressors". That is worth sitting with, because the popular version of this science is exactly the belief they are contradicting. Being watched and judged while you cannot control the outcome raises cortisol. Feeling generally anxious does not automatically do it.
Recovery is quick for most stressors, but not for the one that matters here. Averaged across all tasks, cortisol returned to pre-stressor levels by 41 to 60 minutes after the stressor ended. The uncontrollable, socially-evaluated tasks were the exception, and they ran the other way: they were still significantly elevated 41 to 60 minutes after the stressor stopped (d = 0.28), and the authors note there were not enough studies past 60 minutes to say when they finally came down. What chronic stress does to that pattern over months is a different question, covered in cortisol and chronic stress.
Can you tell if someone is anxious from their cortisol?
No, and the best evidence on the question is more surprising than that.
Adam and colleagues pooled 80 studies, 179 associations and 36,823 participants to test whether a flatter daily cortisol slope, the pattern where the morning peak and the evening trough drift toward each other, tracks poor health. Broadly, it does. Flatter slopes were associated with poorer health in 10 of the 12 outcome types they examined, at an overall effect size of r = .147.
| Outcome | Association with a flatter daily cortisol slope |
|---|---|
| Immune and inflammatory markers | r = .288 (strongest) |
| Externalizing symptoms | r = .254 |
| Cancer diagnosis or progression | r = .231 |
| Fatigue | r = .167 |
| Depression | r = .106 |
| Anxiety | r = −.084, and not statistically significant (p = .066). The only outcome in the whole analysis whose coefficient ran the other way |
The authors put it plainly: "Anxiety was the only health outcome for which the coefficient was negative in direction." Their proposed explanation is that anxiety is characterised by hyper-arousal rather than the hypo-arousal seen in fatigue and depression, and that a high morning cortisol, producing a steeper slope, could contribute to it.
So the honest reading is this. Anxiety is the one thing in that entire meta-analysis you could not have predicted from the shape of someone's cortisol day, and if you had tried, you would have guessed backwards. Anyone selling you a cortisol reading as a measure of your anxiety is selling something the literature does not support. That includes us, and we will come back to it below.
What does high cortisol do to memory and concentration?
It impairs recall, and the mechanism is specific. Cortisol crosses the blood-brain barrier and binds glucocorticoid receptors in the hippocampus, the structure that encodes and retrieves long-term memory. When it is elevated, retrieval of already-consolidated material gets worse.
A systematic review of stress and long-term memory retrieval identified 13 studies covering 962 participants and 25 experimental conditions. Of those conditions, 18 showed an effect of stress on retrieval: 16 showed impairment, and 2 showed enhancement. The review's conclusion is that stress "does impair retrieval, particularly when induced with the TSST, in the afternoon, up to 45 minutes before the onset of the final memory test, in healthy young men."
Note the last clause, because the honest thing to do with a finding is carry its limits with it: much of this work is done on young healthy men recalling word lists in a lab. The blank you draw in a meeting has a real, documented mechanism behind it. That is not the same as a measurement of it. If the fog is worse in your 40s, the interaction between the cortisol rhythm and falling estrogen is a live area, covered in cortisol and perimenopause. If it is worst on 4 hours of sleep, start with cortisol and sleep instead.
So is anxiety a cortisol problem?
No. It is a treatable clinical condition, and it does not have a hormone number attached to it.
StatPearls gives the first-line treatments for generalized anxiety disorder as cognitive behavioural therapy, and SSRI and SNRI medication with a response rate of 30% to 50%. For panic disorder it states flatly that "there are no specific laboratory, radiographic, or other tests required to diagnose panic disorder," while adding that a clinician performs a thorough examination "to rule out an alternative diagnosis." Both halves of that matter. The diagnosis is clinical. The exclusions are physical.
Cortisol does not appear anywhere in the treatment pathway. It is not a target, it is not a marker of progress, and it is not a gate to care. The reason to state that so bluntly is that the alternative framing, the one where anxiety is a data problem awaiting the right sensor, is comfortable, expensive, and it postpones the therapy and the medication that actually have effect sizes behind them.
The rule we are not going to give you
The tidy thing for an article like this to offer is a heuristic for when your symptoms are "just anxiety". Something clean: if it passes in 10 minutes and you can talk yourself down, you are fine.
We are not going to write that, because it is the exact sentence that cost the patients in the Lessmeier survey a median of 3.3 years. Their episodes did pass. They could be talked down. They were also a fixable heart arrhythmia, and the tidy rule is what kept them from finding it.
The rule that is actually safe runs the other way, and it is dull: a new physical symptom gets a physical workup, once, properly, and then you treat the anxiety. Thyroid, glucose, an ECG, a look at every drug you take. That is a normal appointment, not an exotic request. Ask for it, and if the first answer is "it's just stress", ask whether the thyroid was checked.
What cortisol can and cannot tell you
People search this term because they want a physical explanation for something that feels physical, and they have been told the hormone is the answer. The impulse is sound. The hormone is real, it is measurable, and almost nobody has ever seen their own.
To be completely clear about what the Auromone Curve is not, before we say a word about what it is. It is not a mental-health device, and it does not measure anxiety. It cannot tell you whether you have an anxiety disorder, it cannot rule one in or out, and it will not tell you whether you are getting better. The meta-analysis above is the reason: anxiety was the one outcome that a cortisol curve failed to predict, and the association it did find pointed the wrong way. No wearable, including ours, has any business interpreting your mental health, and we are not going to pretend otherwise to sell you one. If you are anxious, the useful next step is a clinician, not a sensor.
What the Curve is designed to do is read cortisol from a trace of sweat on your wrist, continuously, so you can see the shape of your own day: the rise after you wake, the fall by evening, what a hard week does to it. It ships Q4 2026.
For what cortisol is and how it is actually measured, start with Cortisol 101, or read the signs people associate with high cortisol and where those signs really come from. If you arrived here from a related term, adrenal fatigue gets the same treatment.
This guide is for general wellness education only. The Auromone Curve is a general wellness device, not a diagnostic, and does not replace medical advice or clinical testing. Anxiety disorders are diagnosed and treated by clinicians. If you are struggling, please talk to a healthcare provider. If you are in crisis, call or text 9-8-8.
References
- Dickerson SS, Kemeny ME. Acute stressors and cortisol responses: a theoretical integration and synthesis of laboratory research. Psychological Bulletin, 2004;130(3):355-391. (208 studies; d = 0.92 for tasks with both social-evaluative threat and uncontrollability; 0.35 and 0.32 for either alone; no significant response without them; recovery to baseline by 41 to 60 minutes for most tasks, with the uncontrollable social-evaluative tasks still significantly elevated at 41 to 60 minutes, d = 0.28.)
- Adam EK, Quinn ME, Tavernier R, McQuillan MT, Dahlke KA, Gilbert KE. Diurnal cortisol slopes and mental and physical health outcomes: a systematic review and meta-analysis. Psychoneuroendocrinology, 2017. (80 studies, 179 associations, 36,823 participants; overall r = .147; anxiety r = −.084, p = .066, the only negative coefficient.)
- Lessmeier TJ, Gamperling D, Johnson-Liddon V, et al. Unrecognized paroxysmal supraventricular tachycardia: potential for misdiagnosis as panic disorder. Archives of Internal Medicine, 1997;157(5):537-543. (107 patients; 67% met DSM-IV panic disorder criteria; unrecognized in 59 (55%) for a median of 3.3 years; symptoms ascribed to psychiatric origins in 65% of women against 32% of men.)
- StatPearls (NCBI Bookshelf). Generalized Anxiety Disorder. (Differential diagnosis, recommended workup, and the 30% to 50% response rate for first-line SSRI and SNRI treatment.)
- StatPearls (NCBI Bookshelf). Panic Disorder. (No laboratory test diagnoses panic disorder; clinicians examine to rule out alternative diagnoses. Differential includes angina, asthma, congestive heart failure, mitral valve prolapse and pulmonary embolism.)
- StatPearls (NCBI Bookshelf). Pulmonary Embolism. (Risk factors include surgery, immobility, pregnancy and the postpartum period, malignancy, previous venous thromboembolism, obesity, smoking, thrombophilia, oral contraceptives and hormone replacement therapy; about 30% of pulmonary embolisms are unprovoked.)
- StatPearls (NCBI Bookshelf). Asthma. (Early recognition and intervention in asthma exacerbations is crucial to prevent progression to severe, life-threatening stages.)
- StatPearls (NCBI Bookshelf). Alcohol Withdrawal. (Seizures 8 to 48 hours after cessation; alcohol withdrawal delirium can occur at any point up to 3 to 5 days after cessation or reduction; mortality historically as high as 20%, around 1% with prompt treatment.)
- Cleveland Clinic. Hyperthyroidism (Overactive Thyroid). (Symptoms, and that you may experience some of them and not others; T3 and T4 above normal with TSH often below; thyroid storm is an emergency requiring immediate care.)
- Endotext (NCBI Bookshelf). Hyperthyroidism in Aging. (Apathetic hyperthyroidism: the adrenergic symptoms, including palpitations, anxiety, tremor and heat intolerance, are often absent in older adults.)
- Nadarajan V, Perry RJ, Johnson J, Werring DJ. Transient ischaemic attacks: mimics and chameleons. Practical Neurology, 2014. (Young patients with an acute focal neurological deficit can be dismissed as having functional symptoms, especially if they appear anxious; misdiagnosis delays treatment and alters functional outcome.)
- American Heart Association. Heart Attack Symptoms in Women. (As with men, chest pain or discomfort is women's most common heart attack symptom; anxiety, shortness of breath, upset stomach, shoulder, back or arm pain and unusual tiredness are listed among the symptoms typically less associated with heart attack; call 911.)
- Klier C, Buratto LG. Stress and long-term memory retrieval: a systematic review. Trends in Psychiatry and Psychotherapy, 2020;42(3):284-291. (13 studies, N = 962, 25 experimental conditions; 16 showed impairment, 2 showed enhancement; cortisol binds hippocampal glucocorticoid receptors.)
- 9-8-8: Suicide Crisis Helpline (Canada) and the 988 Suicide & Crisis Lifeline (United States). Call or text 9-8-8, 24/7.