High cortisol symptoms: what the signs are and how it is tested

High cortisol symptoms are not one checklist. When doctors talk about too much cortisol over a long time, they mean Cushing’s syndrome. It is rare, and it has a recognizable set of signs. Most of what people link to “high cortisol” online, such as tiredness, poor sleep or a wired feeling, is common and has many other causes.

This page separates the two. It covers the signs medical sources list, the symptoms that don’t point to cortisol on their own, and how doctors actually find out.

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What “high cortisol” can mean

The phrase covers three different things.

• A lab value above a range. A blood result can come back high because of the time of day, stress, exercise, pregnancy, birth control pills or a steroid medicine, according to MedlinePlus. That is a number, not a condition.
• Cortisol that runs high but doesn’t cause lasting harm. MedlinePlus calls this pseudo-Cushing syndrome, and says it can come and go.
• Cushing’s syndrome. NIDDK describes it as the body making too much cortisol over a long period of time. The most common cause is taking high doses of glucocorticoid medicines, such as prednisone, for a long time. Less often, a tumor causes it. That second type is rare, with estimates of about 40 to 70 people per million.

Your cortisol also changes through the day. It is normally highest in the morning and much lower by late evening, so “high” always needs a time attached. See the daily cortisol pattern.

High cortisol symptoms that medical sources list

NIDDK says people with very high cortisol for a long time are likely to have clear signs, including:

• Weight gain
• Thin arms and legs
• Increased fat at the base of the neck
• A fatty hump between the shoulders
• Easy bruising
• Wide purple stretch marks
• Weak muscles

MedlinePlus adds severe fatigue, high blood pressure and high blood glucose.

Some of these are more telling than others. A primary care review in the International Journal of Endocrinology calls weakness in the muscles near the trunk, easy bruising and wide purple stretch marks “relatively specific” signs. Weight gain and high blood pressure are on the list, but they are also very common in people who do not have Cushing’s.

NIDDK also notes that not everyone with Cushing’s has these symptoms, which can make it hard to detect.

Women may have extra hair growth and irregular or stopped periods. Men may have a lower interest in sex, erectile dysfunction or lower fertility. Each has its own page: high cortisol in women and high cortisol in men. The long-term effects, such as bone loss, infections and mood changes, are on the page about what high cortisol does to your body.

Symptoms that don’t point to cortisol on their own

NIDDK says symptoms such as fatigue and weight gain “can have many different causes”, and that Cushing’s may be mistaken for polycystic ovary syndrome or metabolic syndrome. A laboratory-medicine review in Diagnostics says the clinical diagnosis is difficult because the symptoms are non-specific, and that testing should not be done in everyone who simply has obesity or high blood pressure.

Three symptoms get a lot of attention online. None is on the Cushing’s symptom lists above.

• Tiredness. It is common and has many causes, so other checks often come before cortisol. The adrenal fatigue page covers what else to consider.
• Poor sleep. Sleep and cortisol are linked, but not in one simple direction. In the Whitehall II study of more than 3,000 adults, recurrent short sleep was associated with a flatter daily cortisol pattern and higher cortisol later in the day. In a separate study of 23 young adults, one night of sleep deprivation was followed by lower morning cortisol. The first is an association and the second is a small before-and-after study, so neither shows cause and effect. See cortisol and sleep.
• Anxiety or feeling wired. A 2020 review in Frontiers in Psychiatry says overactivity of the stress-hormone system has been seen in certain subgroups of people with anxiety disorders, not in everyone. That is an association, not proof that high cortisol causes anxiety. See cortisol and anxiety.

Adrenal fatigue is not a recognized diagnosis. A 2024 paper in the Journal of the Endocrine Society says it has never been scientifically proven to exist, and that the symptom surveys and saliva profiles sold for it are not validated.

How do you know if your cortisol is high?

You can’t tell from symptoms. A lab has to measure it, and a single blood test usually can’t settle the question.

For suspected Cushing’s syndrome, NIDDK says doctors use urine, saliva or blood tests, and “no one test is perfect, so doctors usually do two” of these:

• A 24-hour urine test. You collect all your urine for a day. A higher than normal level suggests Cushing’s.
• A late-night saliva test. Cortisol normally drops after you fall asleep. In Cushing’s it doesn’t.
• A low-dose dexamethasone suppression test. You take a small dose of dexamethasone at night, and blood is drawn the next morning. Cortisol that doesn’t drop suggests Cushing’s.

The primary care review explains why a random blood sample is not enough. It says using a random cortisol to screen for Cushing’s is unreliable and not recommended. The Diagnostics review adds that when the daily rhythm is what’s being tested, random samples are of no use, because the question is whether cortisol drops at the right time.

So a single blood cortisol can’t diagnose Cushing’s syndrome, and it can’t rule it out. Some people with Cushing’s have symptoms that come and go, and cortisol that varies with them, which is why repeat testing is sometimes needed.

What a blood test can do is give you a number to take to a clinician. Our page on testing for high cortisol explains which test answers which question.

Why symptoms can look like Cushing’s without it

Some conditions raise cortisol and produce similar symptoms without being Cushing’s syndrome. MedlinePlus and NIDDK name depression, anxiety, alcohol use disorder, poorly controlled diabetes and obesity. The doctors’ term is pseudo-Cushing syndrome. A clinician can use a follow-up test, the dexamethasone-CRH test, to tell the two apart.

That is one reason the work-up starts with your history and with your medicines. NIDDK says your doctor may ask whether you take glucocorticoids or have had injections, and rule that out first. MedlinePlus includes pills, shots, inhalers and creams. The full list is on the page about the causes of high cortisol.

When to see a clinician

Book an appointment if you have several of the specific signs above, especially easy bruising, wide purple stretch marks or muscle weakness. NIDDK also says Cushing’s may be the cause in some people who have type 2 diabetes with blood glucose that stays too high, along with high blood pressure. It can be fatal if not treated, though it is treatable.

Bring:

• A short list of symptoms, with when they began.
• Every medicine you use, including pills, injections, inhalers, creams and herbal products.
• Any cortisol results you already have, with the time of day they were taken.

If you take a steroid medicine, don’t stop it or change the dose on your own. MedlinePlus says stopping suddenly can lower cortisol too far. Ask the prescriber.

Questions people ask

How common is Cushing’s syndrome?

NIDDK says endogenous Cushing’s syndrome, meaning the body makes too much cortisol itself, is rare, with estimates of about 40 to 70 people out of every million. It most often affects adults aged 30 to 50 and about three times as many women as men. Steroid medicines are the most common cause overall.

Does a normal blood cortisol rule out Cushing’s?

No. A single blood cortisol can’t rule it out. The primary care review says that after normal screening tests (urine, late-night saliva or dexamethasone), a person with high suspicion of Cushing’s should be referred to an endocrinologist. When suspicion is low, those tests can be repeated in 6 months if symptoms progress.

Can stress alone cause these symptoms?

Stress raises cortisol for a while, and MedlinePlus lists it as a reason results can be abnormal without a disease. Whether everyday stress produces the physical signs of Cushing’s is a different question. The sources above link those signs to long-term cortisol excess from steroid medicines or tumors, not to ordinary daily stress.

Keep reading

• High cortisol in women

  Periods, extra hair growth, pregnancy and birth control pills.

• High cortisol in men

  Lower interest in sex, fertility and what else can cause it.

• Causes of high cortisol

  Medicines, conditions and the normal ups and downs.

• High cortisol in the morning

  The normal morning peak and the early-hours rise.

• Cortisol spikes

  Short rises after stress, and what they are not.

• What a high cortisol level means

  Ranges, timing and why a lab value isn't a diagnosis.

• What high cortisol does to your body

  Short-term effects and the long-term effects of excess.

• Testing for high cortisol

  Which test answers which question.