Because not all anxiety is born in the head. Dysregulated cortisol, an overactive thyroid, swinging glucose and bad sleep produce in the body the same symptoms as psychological anxiety. When the attack appears out of nowhere, with no trigger, the body deserves investigation before any label.
"It just appears." That is the most common description I hear, and the numbers confirm it: in Reactiva's survey on anxiety, with 658 responses, 62% of people mark that their anxiety comes for no reason at all, more than any identifiable trigger. And 35% report it arriving precisely at night, at bedtime.
Anxiety with a reason is psychology. Anxiety without a reason, that appears out of nowhere, wakes you in the small hours or sets your heart racing with no threat in sight, deserves a question almost nobody asks: what is the body doing at that moment?
What fires anxiety from the inside
- •Dysregulated cortisol. The stress hormone high at the wrong time produces rapid heartbeat, chest tightness and a sense of danger, with no bad thought preceding it.
- •Glucose on a rollercoaster. You ate fast carbs, glucose spikes and plummets; the drop releases adrenaline, and adrenaline in the body is indistinguishable from an anxiety attack.
- •An overactive thyroid. Hyperthyroidism, even mild, mimics anxiety disorder with precision.
- •Bad sleep. In our survey, insomnia or light sleep appears among the symptoms most marked by people with anxiety. One badly slept night leaves the emotional brain hyperreactive the next day, and the cycle feeds itself.
The data point nobody told you
In the same survey, more than 80% had already tried something against their anxiety, and the most tried item was medication. If your anxiety is rooted in the body, the anxiolytic muffles the alarm without putting out the fire. That is why so many people "try everything" and stay anxious.
What to investigate
Late-night salivary cortisol when excess is suspected, TSH and free T4, glucose with fasting insulin (not just the glucose reading), ferritin and B12, and, depending on the picture, estradiol, progesterone and testosterone, plus an honest map of your sleep. This does not replace psychological care when it is needed. But anxiety that comes from the body only improves when someone looks at the body.
Dr. Diego Rios · CRM-PI 8347 (Brazilian medical license)
Creator of the Reactiva Method. Five postgraduate degrees: Family Medicine, Endocrinology and Metabolism, Nutrology, Sports Pharmacology and General Ultrasonography.
The answer is not one more isolated lab test. It is reading the system.
Medicine is one. The body does not divide itself into specialties: the model does. When each symptom goes to a different office and each doctor sees one piece, you spend years circling between referrals, holding reports and missing answers. In that back-and-forth, you lose time and health.
Precise diagnosis and treatment come from the opposite path: understanding everything and going deep into one patient. Sleep, hormones, weight, energy and mind interpreted together, because that is how the body works.
Dr. Diego Rios, CRM-PI 8347
Educational content. It does not replace individual medical evaluation and is not a prescription. Patient care is provided in Portuguese.