Cortisol Face
That puffy "stress face" TikTok diagnosed you with? It's real medicine, but you're not Cushing's.
Grounded in the research on Cushing's syndrome (Wikipedia)
What it actually is
"Cortisol face" is a TikTok rebrand of a real clinical sign: facial swelling and roundness from chronically high cortisol. The hardcore medical version is "moon face," the hallmark of Cushing's syndrome, first described by neurosurgeon Harvey Cushing in 1932. Cortisol is your main glucocorticoid stress hormone, made by the adrenal cortex and run by the HPA axis (hypothalamus to pituitary to adrenals). Too much of it for too long redistributes fat to your face, neck and trunk. The viral term smears a spectrum: most people with a puffy face do NOT have Cushing's, they have water retention, poor sleep, alcohol, or salt.
The mechanism, no hand-holding
Cortisol is catabolic and lipogenic in a weirdly regional way. Sustained excess breaks down protein in your limbs while depositing fat centrally: rounded face (moon face), a fat pad on the upper back ("buffalo hump"), and central obesity. It also drives sodium and water retention via mineralocorticoid receptor crossover, so the puffiness is partly literal fluid. True Cushing's is rare, roughly 40 to 70 cases per million, and the most common real cause is iatrogenic: people taking steroid meds like prednisone. Endogenous cases are usually a pituitary tumor (Cushing's disease), which is what the named syndrome traces back to.