High Cortisol (Hypercortisolism)
Chronically elevated cortisol is increasingly common in our modern world and can result from ongoing stress, certain medications, or medical conditions like Cushing's syndrome.
Signs & Symptoms of Elevated Cortisol:
- Physical Changes: Weight gain (especially around the midsection and face), muscle weakness, thinning skin that bruises easily, purple stretch marks, slow wound healing
- Metabolic Effects: High blood sugar and increased diabetes risk, high blood pressure, elevated cholesterol
- Mental/Emotional: Anxiety, depression, irritability, difficulty concentrating, memory problems
- Sleep Disruption: Difficulty falling asleep despite exhaustion, waking frequently, feeling tired despite "enough" sleep
- Immune Dysfunction: Frequent infections, slow recovery from illness
- Reproductive Issues: Irregular periods in women, reduced libido in both sexes, erectile dysfunction in men
- Bone Health: Increased risk of osteoporosis and fractures
High cortisol can create a self-reinforcing loop. Elevated cortisol disrupts sleep, poor sleep increases stress, increased stress raises cortisol further. This is why addressing cortisol issues often requires a multi-faceted approach — treating any single element without addressing the others rarely produces lasting improvement.
Low Cortisol (Hypocortisolism / Adrenal Insufficiency)
While less commonly discussed than high cortisol, chronically low cortisol is equally problematic and can be life-threatening in severe cases (Addison's disease). It can result from autoimmune conditions, prolonged steroid use, or severe prolonged stress leading to what's sometimes called "adrenal fatigue" (though this term is controversial in medical circles).
Signs & Symptoms of Low Cortisol:
- Profound Fatigue: Overwhelming exhaustion not relieved by rest, difficulty getting out of bed, "crashes" in energy
- Blood Sugar Issues: Hypoglycaemia (low blood sugar), intense sugar and salt cravings
- Blood Pressure: Low blood pressure, dizziness upon standing, lightheadedness
- Digestive Problems: Nausea, vomiting, abdominal pain, loss of appetite, unintentional weight loss
- Skin Changes: Hyperpigmentation (darkening of the skin), especially in scars and skin folds
- Mental/Emotional: Depression, mood instability, decreased stress tolerance
- Muscle Issues: Muscle weakness, joint pain
- Immune Challenges: Difficulty recovering from stress or illness
True adrenal insufficiency (Addison's disease) is a serious medical condition requiring immediate medical attention and lifelong hormone replacement. If you suspect you have symptoms of low cortisol, consult with an endocrinologist for proper testing and diagnosis. An adrenal crisis — where cortisol drops dangerously low during illness or injury — is a medical emergency.
The "Adrenal Fatigue" Debate
You may have encountered the term "adrenal fatigue" in wellness circles — the idea that prolonged stress gradually depletes the adrenal glands until they can no longer produce adequate cortisol. While mainstream medicine does not recognise "adrenal fatigue" as a diagnosable condition (the adrenal glands don't fatigue in this way), the symptom cluster it describes — exhaustion, brain fog, salt cravings, poor stress tolerance — is very real for many people.
What likely underlies these symptoms is not exhausted adrenal glands but rather dysregulation of the HPA axis — the feedback loop between the hypothalamus, pituitary, and adrenals becomes less responsive after prolonged stress, leading to a blunted cortisol rhythm rather than outright low production.
Whether you call it HPA axis dysregulation, cortisol rhythm disruption, or burnout — the underlying experience is the same. The important thing is to seek proper testing (salivary cortisol rhythm testing is most informative) rather than self-diagnosing or self-treating. See Section 07 for guidance on testing options.
When to Seek Medical Evaluation
While lifestyle strategies can meaningfully support healthy cortisol rhythm (see Section 07), some situations warrant prompt medical attention:
- Symptoms of Cushing's syndrome (rapid weight gain, rounded face, purple stretch marks, extreme muscle weakness)
- Symptoms of Addison's disease (profound fatigue, skin darkening, persistent nausea/vomiting, very low blood pressure)
- Salt craving so intense it disrupts daily life
- Fainting or near-fainting, especially upon standing
- Symptoms that significantly impair daily functioning and don't respond to lifestyle changes
In these cases, working with an endocrinologist for proper testing is essential. The next sections cover the environmental and internal factors that contribute to cortisol dysregulation — knowledge that empowers you to make targeted changes.