Rikta

A high cortisol reading can reflect normal daily swings, short-term strain, or a hormone imbalance that needs medical care.

Most adult morning blood cortisol sits near 140–690 nmol/L, then drops later in the day; your lab’s time-of-day range is the one that counts.

Cortisol swings high or low when adrenal signals or steroid meds shift, showing up as sleep trouble, weight change, fatigue, or dizziness.

Most labs expect higher cortisol in the early morning and lower later; common 8 a.m. serum values run 140–690 nmol/L, but your lab’s range wins.

Many labs list morning blood cortisol near 5–25 µg/dL, with lower late-day values; your lab’s method and timing shape the range.

Kids’ cortisol is often higher after waking and lower near bedtime, with swings tied to sleep, illness, and steroid medicines.

In Addison’s disease, cortisol runs low all day, so stress, illness, and missed meds can bring fatigue, dizziness, nausea, and shaky blood sugar suddenly.

Cushing disease often keeps cortisol high at night and flattens the usual morning-to-midnight drop.

Cortisol is a stress hormone that rises in the morning and falls at night; lab ranges vary, so timing, meds, and symptoms shape what a result means.

Cortisol can push blood sugar up by driving liver glucose release and insulin resistance, so stress and steroid use can make readings run higher.