Myths vs facts: TSH Schilddrüse and stress

Myth: Stress directly and always raises TSH, causing hypothyroidism. Fact: Acute stress can transiently suppress TSH via cortisol/CRH, while chronic stress may dysregulate the HPT axis, but effects are small and rarely reach clinical significance. A normal TSH (0.4–4.0 mU/L) does not rule out stress-related symptoms. TSH is a screening tool, not a stress biomarker. Evidence is human-observational and moderate; no RCTs prove causation. Caveat: Many confounders (sleep, diet, inflammation) affect TSH. Clinically abnormal TSH requires endocrinological workup, not attribution to stress alone.