You may have seen a post that says your tiredness, your belly and your bad sleep all come from "high cortisol." It is a tidy story, and it is everywhere online. The truth is more careful. Cortisol is a real hormone, and long-term high cortisol is a real medical condition. Feeling wired and tired at the same time has many possible causes, and your doctor can help sort them out.
This article separates the two. If you live in the Triangle and you are juggling work, family and poor sleep, it should help you know what to ask your own doctor and what you can change at home. It is general education, not medical advice.
What does cortisol do?
Cortisol is a hormone made by your adrenal glands, two small glands on top of your kidneys.1 It is often called the stress hormone, and it does much more than that. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) says it helps maintain blood pressure, regulate blood sugar, reduce inflammation and turn food into energy.1
Cleveland Clinic adds that cortisol helps control your sleep-wake cycle. Most people have lower cortisol in the evening and peak levels in the morning, right before waking.3 That daily rise and fall is normal and healthy.
Your body also releases cortisol when you are under stress, whether the stress is short-term, long-term or traumatic.3 So a higher cortisol level during a hard week is not a disease. It is your stress response doing its job. The question is whether your body makes far too much for a long time, which is a different matter.
What are the symptoms of true high cortisol?
Cushing's syndrome is the medical condition of too much cortisol over a long period of time.1 NIDDK says the kind caused by something inside the body, called endogenous Cushing's syndrome, is rare, with estimates of about 40 to 70 people per million.1 It most often affects adults aged 30 to 50, and about three times as many women as men.1
The signs come as a pattern, not a single complaint. NIDDK lists these for people with very high cortisol for a long time:1
- Weight gain with thin arms and legs
- A round face
- Increased fat around the base of the neck and a fatty hump between the shoulders
- Easy bruising
- Wide purple stretch marks, mainly on the abdomen, breasts, hips and under the arms
- Weak muscles
Mayo Clinic adds thin, frail skin that bruises easily, wounds that are slow to close, and acne. It also lists extreme tiredness, depression, anxiety, irritability, trouble concentrating and sleeplessness among other possible symptoms.2 For women, NIDDK and Mayo Clinic list extra hair on the face and body, and periods that become irregular or stop.12
Cushing's syndrome can cause serious health problems. NIDDK lists heart attack, stroke, blood clots in the legs and lungs, infections, bone loss and fractures, high blood pressure, unhealthy cholesterol and type 2 diabetes.1 That is why it needs a doctor and not a home plan.
Here is a point many people miss. The most common cause is not a tumor. NIDDK says it is the long-term, high-dose use of cortisol-like medicines called glucocorticoids, which are used for conditions such as asthma, rheumatoid arthritis and lupus.1 If you take one of these medicines, talk with the doctor who prescribed it. Do not stop or change it on your own. Cleveland Clinic says suddenly stopping corticosteroids can lead to low cortisol.3
Here is a plain comparison of the two situations:
| Sign | Everyday stress | Possible Cushing's syndrome |
|---|---|---|
| What it is | Your normal stress response, which rises and falls | Too much cortisol over a long time |
| How common | Everyone has it7 | The endogenous form is rare, about 40 to 70 per million1 |
| Typical signs | Worry, changes in energy and appetite, trouble sleeping, headaches7 | A pattern such as round face, thin limbs, easy bruising, wide purple stretch marks, weak muscles1 |
| Who sorts it out | You and your doctor, with habit changes | Your doctor, with lab tests1 |
Is "cortisol belly" real?
Stress can push weight up, but "cortisol belly" as a social media label is not a medical diagnosis. Two parts of the story are real. The rest is hype.
First, stress and appetite are linked. Harvard Health says that when stress lasts, the adrenal glands release cortisol, which increases appetite, and that cortisol may stay high if the stress response stays stuck "on." It also says stress appears to shift food preferences toward high-fat, sugary foods.4 So stress can lead to weight gain through appetite and food choices, and your doctor can tell you whether anything else is going on.
Second, midlife changes the body on its own. The National Institute on Aging says that during the menopausal transition, the body begins to use energy differently, fat distribution changes, and women may gain weight more easily.5 The same page says your waist could get larger and you could lose muscle and gain fat.5 If you are in your 40s or 50s, these changes may be part of the picture. Our perimenopause guide covers those changes.
The pattern of true Cushing's syndrome is also different. NIDDK describes weight gain with thin arms and legs, a round face and a fatty hump between the shoulders.1 It is not just a soft belly. NIDDK also warns that Cushing's syndrome can be mistaken for conditions such as polycystic ovary syndrome or metabolic syndrome, so a doctor first rules out other causes.1
How is high cortisol tested?
Doctors diagnose Cushing's syndrome from your medical history, a physical exam and lab tests. NIDDK says they may use urine, saliva or blood tests, and that because no single test is perfect, doctors usually do two of them to confirm.1 They also ask whether you take glucocorticoids or have had steroid injections, and rule that out first.1
The three tests NIDDK describes are:1
- A 24-hour urine collection for free cortisol.
- A late-night saliva test. Normally cortisol drops just after we fall asleep. In Cushing's syndrome it does not drop.
- A low-dose dexamethasone suppression test, where you take a small dose of a steroid at night and have blood drawn the next morning.
Cortisol is normally higher in the morning and lower in the evening,3 and these tests are done at set times, such as late at night or the morning after a dexamethasone dose.1 The Endocrine Society also says that blood or saliva tests offered for "adrenal fatigue" are not based on good scientific studies, so their results may not be correct.11 If a test is sold to you online with a promise to explain your tiredness, bring the result to your own doctor before you act on it.
What lowers everyday stress hormones?
Sleep, movement, daylight, slow breathing and time outside are low-risk habits that health agencies suggest for stress. They are not a substitute for a doctor's care if you have a medical condition.
Cleveland Clinic says there are several general ways to help lower cortisol: quality sleep, regular physical activity, deep breathing exercises, and enjoying yourself and laughing.3 Here is how to put those to work. Start with one.
Sleep. The CDC says adults aged 18 to 60 need 7 or more hours, and it suggests going to bed and getting up at the same time every day, keeping the bedroom cool and quiet, and turning off devices at least 30 minutes before bed.6 Cleveland Clinic notes that chronic sleep problems can raise cortisol.3
Daylight and your body clock. The National Institute of General Medical Sciences says light and dark have the biggest influence on your circadian rhythms, which affect sleep patterns and hormone release, and that light from electronic devices at night can confuse your biological clock.10 A simple use of that: get outside in daylight, and dim screens in the evening.
Caffeine timing. The CDC suggests avoiding caffeine in the afternoon or evening to protect sleep.6
Movement. The CDC says physical activity helps you feel better, function better and sleep better, and that adults who are not active can build up to 150 minutes a week of moderate activity.9
Breathing. The National Center for Complementary and Integrative Health (NCCIH) says studies have shown slow, deep breathing may modestly lower blood pressure and reduce cortisol. It calls the evidence for reducing stress preliminary, based on a 2019 review of three studies.8
Time outside and people. The CDC lists spending time outdoors, being active or relaxing, writing in a journal and talking with people you trust as ways to cope with stress. It also says to take breaks from news and social media.7
I look at stress the way I look at a garden. The Roots (stress) and the Rhythm (sleep and energy) feed each other, so one small change in either helps both. For more on calming your nervous system, see nervous system regulation and our guide to stress relief techniques.
What about "adrenal fatigue"?
"Adrenal fatigue" is a popular label, but it is not a recognized medical condition. The Endocrine Society says no scientific proof supports it, and that there is no test that can detect it.11 The concern is that the real cause of your tiredness may be missed. The Endocrine Society says people with these symptoms may have adrenal insufficiency, depression, obstructive sleep apnea or other health problems, and that finding the real cause is what matters.11 We explain this in more depth in adrenal fatigue symptoms.
When should you see your own doctor?
See your own doctor if you notice the pattern of Cushing's syndrome, or if tiredness, weight change or mood change lasts and has no clear reason. Mayo Clinic says to call your health care provider if you have symptoms of Cushing syndrome, especially if you take glucocorticoid medicine for a condition such as asthma, arthritis or inflammatory bowel disease.2
Book a visit if you notice any of these:
- Easy bruising, wide purple or pink stretch marks, or thin, frail skin.12
- A round face, a fatty hump between the shoulders, or weight gain in the trunk with thin arms and legs.12
- Weak muscles, especially in the upper arms and thighs.13
- Periods that become irregular or stop, with extra hair on the face or body.12
- High blood pressure or high blood sugar, which Cushing syndrome can cause.23
- Fatigue with weight loss and loss of appetite, which can signal low cortisol, so it needs a doctor too.3
Cleveland Clinic also advises talking with your provider if you are concerned about your daily stress levels, so you can plan steps to manage it.3
Emergency, call 911: chest pain, severe shortness of breath, fainting, or sudden severe weakness or confusion.
Crisis, call or text 988: if stress or low mood comes with thoughts of harming yourself, call or text 988, the 988 Suicide & Crisis Lifeline, free and open all day and night. If your life is in danger, call 911.7
To see which part of your daily life to look at first, take the Garden Check-in. It is free and takes about three minutes. This page is for education. It does not replace advice from your own doctor.