“It’s probably anxiety.” You left the appointment with those three words and not much else. And something about them didn’t sit right — not because you dismiss anxiety as real, but because it felt like a premature conclusion.

And now you’re home, still feeling exactly the same, wondering: is it really anxiety? Or did something just get missed?

Both possibilities deserve an honest answer.

 

First: Anxiety Is a Real and Valid Diagnosis

Anxiety is a legitimate medical condition that produces genuinely physical symptoms. It is not weakness. It is not imaginary. And when a physician identifies it, they are often — not always, but often — correct.

Anxiety and panic disorders can cause a striking range of physical symptoms: racing heart, chest tightness, shortness of breath, dizziness, tingling sensations, GI distress, fatigue, and a pervasive sense that something is physically wrong. These aren’t metaphors for emotional distress. They’re real physiological events — driven by the autonomic nervous system, measurable in heart rate variability and cortisol levels, and genuinely disruptive to how the body functions.

So when a physician considers anxiety, they’re not dismissing you. They’re considering a diagnosis that is common, that presents physically, and that responds well to treatment.

That’s the honest starting point.

 

But Here’s Where It Gets Complicated

Anxiety is also, statistically, one of the most over-applied explanations in medicine — particularly for certain patients.

Research consistently shows that women, younger patients, and people who present with diffuse or multi-system symptoms are more likely to have their physical complaints attributed to anxiety or stress before a thorough medical workup is complete. The diagnosis sometimes arrives not because the clinical picture clearly points there, but because the alternative — an extensive, open-ended investigation — takes time, resources, and cognitive bandwidth that a 15-minute appointment can’t always support.

In a healthcare system built around limited time and competing demands, shortcuts occur — and when the anxiety label functions as a diagnostic off-ramp, that’s where patients can get hurt.

 

The Core Clinical Problem: Anxiety and Several Medical Conditions Look Identical

Here’s what makes this genuinely difficult, and why even careful physicians get it wrong: a number of serious medical conditions produce symptoms that are physiologically indistinguishable from anxiety — especially in early or intermittent stages.

Thyroid disorders are among the most commonly missed. Hyperthyroidism in particular — an overactive thyroid — produces racing heart, heat intolerance, tremor, irritability, weight changes, and a wired, on-edge feeling that maps almost perfectly onto a generalized anxiety presentation.

Cardiac conditions produce symptoms — pounding heart, chest tightness, shortness of breath, a sense of impending doom — that overlap almost perfectly with anxiety. Women are particularly vulnerable here, as heart attacks in women frequently present without classic chest pain and have been mistaken for anxiety or stress often enough that it’s a recognized pattern in the medical literature.

POTS (Postural Orthostatic Tachycardia Syndrome) and dysautonomia more broadly are chronically underdiagnosed conditions involving dysfunction of the autonomic nervous system — the same system that governs the fight-or-flight response.

Early autoimmune disease — often begins with a constellation of vague, fluctuating symptoms: fatigue, cognitive changes, low-grade malaise. In the absence of clear lab abnormalities (which are often absent early), these presentations can be attributed to stress or anxiety, sometimes for years before the picture clarifies.

The common thread: all of these conditions can produce genuine anxiety as a symptom, not just a mimic. Which means even if anxiety is present and real, it may be a downstream effect of something that hasn’t been found yet.

 

A Tool Most Patients Have Never Heard Of: THINC MED

A useful framework for systematically evaluating whether anxiety has a medical cause comes from Georgetown University psychiatrist Dr. Robert Hedeya. It’s called THINC MED — and it’s a clinical checklist designed to ensure that medical causes of anxiety symptoms are considered before landing on a primary psychiatric diagnosis.

The acronym stands for:

• T — Tumors (including endocrine tumors like pheochromocytoma or carcinoid)
• H — Hormones (thyroid, adrenal, reproductive hormones, blood sugar dysregulation)
• I — Infectious disease (chronic infections)
• N — Nutrition (vitamin deficiency, vitamin overload/toxicity, malabsorption disorders)
• C — Central nervous system (neurological conditions like myasthenia gravis, early neurodegenerative diseases)
• M — Miscellaneous (cardiac conditions, respiratory disorders, dysautonomia, rheumatological disorders, and rare conditions, such as Wilson’s disease [a genetic disorder of copper metabolism], porphyria [a disorder of heme production])
• E — Electrolytes and environmental (electrolyte imbalances, toxin exposure, mold, heavy metals)
• D — Drugs (over-the-counter and prescription medications, herbal supplements, caffeine, stimulants)

This framework illustrates how extensive the overlap between medical conditions and anxiety symptoms can be. If you’ve been told your symptoms are anxiety but a systematic workup along these lines has never been discussed, that’s a reasonable and specific gap to raise with your physician.

 

How to Tell the Difference: Questions Worth Asking Yourself

There’s no clean line, but certain features of your experience are worth paying attention to — and worth bringing to your physician clearly.

Timing and triggers matter. Anxiety symptoms tend to track with psychological stressors — they worsen during periods of pressure, conflict, or uncertainty, and improve when those pressures ease. If your symptoms have no clear relationship to stress, arrive unpredictably, or occur when you’re calm or even asleep, that pattern deserves attention.

Positional or physical triggers are a signal. If symptoms reliably appear when you stand up, exercise, eat, or change position — rather than in response to worry or social situations — that’s physiologically significant.

Your own read on it counts. You know the difference between feeling anxious and feeling like something is physically wrong. That distinction isn’t always diagnostically reliable, but it’s also not meaningless. Patients who say “this doesn’t feel like anxiety to me” are often picking up on something real.

 

What to Actually Say in Your Appointment

If you’ve been given an anxiety diagnosis that doesn’t feel complete, the goal isn’t to reject it outright — it’s to ensure the workup behind it was thorough. These questions open that door without putting your physician on the defensive:

“Before we settle on anxiety, what medical causes have been ruled out?” — This is the most direct way to ask for an account of the differential, not a debate about the conclusion. [“Differential” is short for differential diagnosis — the working list of possible explanations your doctor is mentally weighing.]

“I want to take the anxiety diagnosis seriously — but I’d feel more confident if we’d ruled out a few things first. What would that workup look like?” — This framing is more collaborative. You’re not saying they’re wrong. You’re asking to be thorough together.

“Has my thyroid been checked? What about a cardiac monitor for the episodes?” — These two are the most common medical reasons for anxiety, so inquiring about them is reasonable and hard to dismiss.

 

When Anxiety Really Is the Answer

It’s worth sitting with the possibility that the diagnosis is right.

If you’ve had a thorough medical workup, the physical causes have been reasonably excluded, and the anxiety diagnosis was made thoughtfully rather than reflexively — treatment works. Cognitive behavioral therapy has a strong evidence base. Medication is effective for many people. And treating anxiety, when that’s genuinely what’s driving the symptoms, often resolves the physical symptoms along with it.

The goal isn’t to resist the diagnosis. It’s to make sure it was earned — that it arrived at the end of a process rather than instead of one.

There’s a meaningful difference between a physician who has considered and excluded the medical possibilities and concluded anxiety is most likely — and one who reached for anxiety because it was the path of least resistance. You deserve the first kind of answer. And asking the questions above are how you find out which one you got.

 

The Takeaway

“It’s probably anxiety” can be the right answer, a premature answer, or a lazy one — and from the outside, they can feel identical.

What distinguishes them isn’t the diagnosis itself. It’s the rigor behind it. Whether the thyroid was checked. Whether the heart was monitored. Whether autonomic dysfunction was considered. Whether a framework like THINC MED — or something similar — guided the thinking.

You’re not obligated to accept a diagnosis just because it was offered. You’re entitled to understand the reasoning, know what was ruled out, and ask what it would take to be more certain.

That’s not being a difficult patient  — it’s being an informed one.