What cortisol does
Cortisol is a hormone made by the adrenal glands, often called the stress hormone because it rises when the body responds to a demand. Its normal jobs are broad: Cleveland Clinic and Mayo Clinic describe it helping to control blood pressure, reduce inflammation, keep the heart and blood vessels working, regulate blood sugar, and convert food into energy. In normal amounts it is essential.
The reason people search for the signs of high cortisol is that too much of it, sustained over time, can cause real problems. Understanding what elevated cortisol looks like, and how it differs from a stressful week, is the first step in deciding whether it is worth checking. Hormones like cortisol are among the markers a Different Health assessment measures and an in-house MD reviews, which is how a vague suspicion turns into an actual answer.
The signs to watch for
When cortisol stays high enough to cause the medical condition known as Cushing syndrome, it produces a recognizable pattern. Not everyone has every sign, and severity varies with how much extra cortisol is present.
| Area | What can show up |
|---|---|
| Body shape | Weight gain around the midsection and upper back, rounded ("moon") face, fatty hump between the shoulders |
| Skin | Pink or purple stretch marks, easy bruising, thinner skin, slower healing |
| Muscle and bone | Muscle weakness, bone loss over time |
| Metabolic | High blood pressure, higher blood sugar, sometimes type 2 diabetes |
| Mood and energy | Fatigue, irritability or anxiety, trouble sleeping and concentrating |
Common signs of sustained high cortisol (Cushing syndrome), as described by Mayo Clinic and Cleveland Clinic. These are non-specific individually; a clinician interprets them together.
The high cortisol symptoms people notice first are often the everyday ones, fatigue, poor sleep, weight gain, and mood changes, precisely because they are common. That overlap is why the physical signs that are more specific to cortisol excess, such as purple stretch marks or a fatty hump, carry more weight in pointing toward a genuine hormonal cause.
Stress cortisol vs. a medical problem
This distinction matters more than any single symptom. Everyday stress raises cortisol as designed, and chronic stress or poor sleep can keep it somewhat elevated. That is a real phenomenon worth managing, but it is generally not the same as the prolonged, markedly high cortisol that defines Cushing syndrome.
Researchers note that few signs of cortisol excess are unique to it in isolation, and that features like weight gain, high blood pressure, and higher blood sugar are common in people without any cortisol problem at all. That is exactly why symptoms alone cannot settle the question, and why testing and clinical judgment do the real work. If your concern is stress-driven cortisol rather than a medical condition, the practical steps center on sleep, activity, and stress management, which we cover separately in our guide to lowering cortisol.
What causes high cortisol
When cortisol is genuinely elevated over the long term, there are a few well-defined causes. Cleveland Clinic identifies the most common ones directly.
The most common causes of Cushing syndrome are taking corticosteroid medications or developing a tumor on the pituitary or adrenal glands.
Long-term use of corticosteroid medications such as prednisone, often prescribed for conditions like asthma, arthritis, lupus, or inflammatory bowel disease, is a leading cause. The other main category is tumors, usually benign, on the pituitary gland or the adrenal glands that drive excess cortisol production. Because one of these causes is medication-related and identifiable, telling a clinician about every drug you take is an important part of any evaluation.
How high cortisol is tested
Cortisol can be measured in blood, saliva, or urine, and the timing matters because levels follow a daily rhythm, typically highest in the morning and lowest at night. A morning cortisol blood measurement is one common starting point. Because a single value can be thrown off by stress, illness, and medications, clinicians usually interpret it alongside symptoms and may repeat or combine tests to get a clear picture.
This is where structured testing helps more than a one-off number. Different Health includes a morning cortisol reading in the 125-plus biomarker blood panel of its DH360+ assessment, reviewed by an in-house MD. Rather than leaving you to interpret a lone result, a team of MDs and PhDs reads cortisol in the context of your sleep, metabolic, and other markers, then turns the picture into a coached plan, with the ability to retest and track it over time.
What to do next
If the signs above sound familiar, the useful response is proportionate rather than alarmed. Most people with fatigue, stress, and some weight gain do not have Cushing syndrome, which is relatively rare, but the symptoms are still worth understanding and, where warranted, checking.
Mayo Clinic advises contacting a doctor if you have signs that suggest Cushing syndrome, especially if you take corticosteroid medication, and the more specific physical changes, purple stretch marks, easy bruising, rapid central weight gain, or muscle weakness, deserve prompt attention. For most people, the sensible path is to get cortisol measured properly and interpreted in context, then act on what the result actually shows. This article is educational and not a substitute for personal medical advice.
Key takeaways
- Recognizable pattern: the clearest signs of high cortisol include central weight gain, a rounded face, purple stretch marks, easy bruising, and muscle weakness, per Mayo and Cleveland Clinic.
- Non-specific overlap: fatigue, poor sleep, and mood changes are common to many conditions, so symptoms point toward testing rather than a diagnosis.
- Stress is different: everyday stress raises cortisol temporarily, which is not the same as the sustained excess of Cushing syndrome.
- Known causes: long-term corticosteroid medication and pituitary or adrenal tumors are the main drivers of true high cortisol.
- Timing matters in testing: cortisol is measured in blood, saliva, or urine, often in the morning when it peaks, and read in clinical context.
- Get evaluated: specific signs like purple stretch marks or rapid central weight gain, especially on corticosteroids, warrant prompt medical attention.
Frequently asked questions
What are the signs of high cortisol?
According to Cleveland Clinic and Mayo Clinic, when cortisol is elevated enough to cause Cushing syndrome, common signs include weight gain around the midsection and upper back, a rounded face, a fatty hump between the shoulders, pink or purple stretch marks, easy bruising, thin skin, and muscle weakness. It can also contribute to high blood pressure, bone loss, and sometimes type 2 diabetes. Many of these signs are non-specific, so testing is what confirms high cortisol.
What causes high cortisol?
Cleveland Clinic notes the most common causes of sustained high cortisol are taking corticosteroid medications such as prednisone over a long period, and tumors on the pituitary or adrenal glands that drive cortisol production. Ordinary life stress raises cortisol temporarily, but that is different from the prolonged, high levels that define a medical condition. A clinician can distinguish between the two.
Can stress alone cause high cortisol?
Stress raises cortisol as part of the body's normal response, and chronic stress or poor sleep can keep it elevated. However, this is generally different from Cushing syndrome, which involves prolonged, markedly high cortisol usually caused by medication or a tumor. Stress-related elevation and true clinical hypercortisolism are not the same thing, which is why a proper evaluation matters.
How do you test for high cortisol?
Cortisol can be measured through blood, saliva, or urine tests, often timed to the morning when levels are naturally highest. Because a single reading can be affected by stress, illness, and medications, clinicians usually interpret cortisol alongside symptoms and may repeat or combine tests. A morning cortisol blood measurement is one common starting point, always read in clinical context.
What does high cortisol feel like day to day?
People with elevated cortisol often report fatigue, difficulty sleeping, irritability or anxiety, and trouble concentrating, alongside physical changes like weight gain. These experiences overlap heavily with ordinary stress and many other conditions, so how you feel is a reason to look into it rather than a diagnosis on its own. This is educational information, not personal medical advice.
When should I see a doctor about high cortisol?
Mayo Clinic advises contacting a doctor if you have signs that suggest Cushing syndrome, especially if you take corticosteroid medication for a condition like asthma, arthritis, or inflammatory bowel disease. Rapid weight gain around the midsection and face, purple stretch marks, easy bruising, or muscle weakness are worth prompt evaluation. Early assessment improves the chances of a good outcome.