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John F. Kennedy was diagnosed with Addison disease in 1947 and spent his political career denying it.
Voters read his bronzed complexion as vigor, the look of a man who spent weekends sailing. His medical records, opened in 2002, told a different story.
The color was ACTH acting on melanocytes, and it came with chronic pain, gastrointestinal illness, and daily steroid dependence.
Primary adrenal insufficiency is rare: roughly 100 to 140 cases per million in Western populations. That rarity is exactly why it gets missed.
Five mistakes primary care teams make with Addison disease
1. Reading the hyperpigmentation as tan, sun damage, or normal variation
What is happening: cortisol deficiency removes negative feedback on the pituitary, so ACTH rises. ACTH and melanocyte-stimulating hormone share the same precursor (pro-opiomelanocortin), so melanocytes get stimulated along the way. The result is diffuse bronzing, heavier in sun-exposed skin but not limited to it.
The skin is also a discriminator. Secondary adrenal insufficiency has low ACTH, so the pigmentation is absent.
Practical tip: a patient who “tans easily” or looks tanned in winter, plus fatigue or weight loss, gets examined at the sites in mistake two.
2. Not examining the creases, scars, mucosa, and pressure points
Diffuse tanning is easy to rationalize. Pigment in places a tan does not reach is not. Check:
Palmar creases, knuckles, elbows, knees
Scars: those formed after disease onset darken, older ones do not, which gives you a timeline
Buccal mucosa, gums, tongue: patchy blue-black or brown pigmentation
Nipples, areolae, genitalia
Nail beds: longitudinal bands
Practical tip: open the mouth, look at the palm creases, ask when any dark scars formed. Thirty seconds, and the highest-yield step in the exam.
3. Attributing the systemic symptoms to depression, an eating disorder, or a viral illness
The presenting complaints are fatigue, anorexia, weight loss, nausea, abdominal pain, salt craving, orthostatic dizziness, and low mood. Every one of them has a more common explanation, which is the problem.
Patients, particularly young women, are frequently treated for depression or evaluated for disordered eating while cortisol keeps falling. Salt craving is the symptom to ask about directly; patients rarely volunteer it.
Practical tip: unexplained weight loss, plus fatigue, plus any one of hyperpigmentation, hyponatremia, hyperkalemia, or orthostasis, is adrenal insufficiency until tested.
4. Ordering a random cortisol and calling it excluded
Cortisol is diurnal and stress-responsive. A random afternoon value in the normal range excludes nothing.
The Endocrine Society guideline recommends an 8 am serum cortisol paired with plasma ACTH as the initial screen, with a cosyntropin stimulation test to confirm. Reading the morning value:
Below about 3 mcg/dL: strongly suggestive
About 15 to 18 mcg/dL or above: diagnosis unlikely
In between: stimulation testing is indicated
Add sodium, potassium, glucose, and renin/aldosterone to the same draw.
Practical tip: order 8 am cortisol and ACTH together. If the patient is on any glucocorticoid (inhaled, intra-articular, or high-potency topical included), note it. Exogenous steroids suppress the axis and confuse interpretation.
5. Diagnosing the disease but not preparing the patient for crisis
Adrenal crisis carries meaningful mortality. Infection, surgery, vomiting, and missed doses precipitate it. Every patient on replacement needs:
Sick-day rules: double or triple the dose with fever or illness
An emergency injectable hydrocortisone kit, with training for the patient and a family member
A medical alert identifier
Primary care is where these get reinforced, because endocrinology visits are infrequent.
Ask about associated autoimmune disease as well. Autoimmune Addison clusters with thyroid disease, type 1 diabetes, vitiligo, and pernicious anemia.
Practical tip: at every visit, confirm the emergency kit exists, is not expired, and that someone at home knows how to use it.
Why this matters
Addison disease is one of the few endocrine emergencies where the diagnosis is written on the skin.
Kennedy’s physicians managed it for years while the public saw only the color. Most patients today do not have a team of physicians, and the gap between first symptom and diagnosis is measured in years.
The exam is free. The screening test is a morning blood draw. The alternative is a crisis presentation…
Practical reset checklist for you to keep in mind
Bronzed skin with fatigue or weight loss: examine palmar creases, knuckles, buccal mucosa, recent scars
Salt craving: ask directly
Any suspicion: 8 am cortisol plus ACTH, electrolytes, glucose; cosyntropin test if indeterminate
Never rely on a random cortisol to exclude
Diagnosed patients: sick-day rules, injectable hydrocortisone kit, medical alert, family training
Screen for associated autoimmune disease: TSH, glucose, B12
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Every year a patient spends between first symptom and diagnosis is a year of being told they are tired, sad, or not eating enough. The test that ends that is a morning blood draw.
The exam that prompts it costs thirty seconds and a good look at the palms.
Until next time, stay curious and keep translating science into realistic hope.
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