Adrenal Awareness Month

Join Dr. Tobias Carling, world-renowned adrenal surgeon and Director of the Carling Adrenal Center, as he kicks off Adrenal Awareness Month and announces the first-ever Conn’s Syndrome Awareness Day on April 14. 


Conditions like Conn’s syndrome, Cushing’s syndrome, and pheochromocytoma often go undiagnosed for years—silently impacting blood pressure, energy, mood, and more. But with early testing, lives can be changed—and even saved.


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    Learn more about Conn's Syndrome

    Conn’s Syndrome Awareness Day April 14

    Conn’s Syndrome Awareness Day April 14

    Conn’s Syndrome Awareness Day April 14

    This Silent Cause of High Blood Pressure Deserves a LOUD Voice

    Conn’s syndrome, also known as primary hyperaldosteronism, is one of the most common—but most overlooked—causes of high blood pressure. Join us this April 14 to raise awareness and help patients find the answers they deserve.

    Learn the signs. Know the tests. Share the message.


    Join us for a LIVE Q&A with Dr. Carling on April 14 at 3 p.m ET.

    Register today

    What is Conn’s Syndrome?

    Conn’s Syndrome Awareness Day April 14

    Conn’s Syndrome Awareness Day April 14

    Conn’s syndrome, or primary hyperaldosteronism, is a condition where one or both adrenal glands produce too much aldosterone—a hormone that controls salt and water balance. This overproduction causes the body to retain sodium, lose potassium, and raise blood pressure.

    Although it affects millions of people, Conn’s syndrome often goes undiagnosed because its symptoms mimic common conditions like essential hypertension, fatigue, and anxiety.

    Why It Matters

    Conn’s Syndrome Awareness Day April 14

    Who Should Be Tested?

    • 1 in 10 people with high blood pressure may actually have Conn’s syndrome.


    • It’s a curable cause of hypertension, but most patients never get tested.


    • Left untreated, it increases the risk of stroke, heart attack, kidney disease, and even early death.

    Who Should Be Tested?

    How Conn’s Syndrome is Diagnosed

    Who Should Be Tested?

    You may want to ask your doctor about Conn’s syndrome if you:

    • Have high blood pressure—especially if diagnosed before age 40
    • Take multiple medications to control your blood pressure
    • Experience low potassium levels
    • Have a history of adrenal nodules or tumors
    • Suffer from chronic fatigue, muscle weakness, or frequent headaches

    Recognizing the Symptoms

    How Conn’s Syndrome is Diagnosed

    How Conn’s Syndrome is Diagnosed

    Common signs of Conn’s syndrome: 

    • High blood pressure that’s difficult to control
    • Low potassium levels
    • Fatigue and muscle cramps
    • Brain fog and irritability
    • Frequent urination or nighttime urination
    • Headaches or heart palpitations

    Even mild symptoms should not be ignored—Conn’s is progressive and is more dangerous over time.


    The good news? Conn’s syndrome can often be completely cured with surgery to remove the adrenal tumor. When surgery isn’t an option, medications like mineralocorticoid receptor antagonists can help. 

    How Conn’s Syndrome is Diagnosed

    How Conn’s Syndrome is Diagnosed

    How Conn’s Syndrome is Diagnosed

    Diagnosis typically involves:

    • Blood tests to measure aldosterone and renin levels (often expressed as the aldosterone-to-renin ratio)
    • Confirmatory testing through salt-loading or additional lab evaluations
    • Imaging studies such as a CT scan of the adrenal glands
    • In some cases, adrenal vein sampling (AVS) may be performed to determine whether one or both adrenal glands are overactive. Note: AVS is not always necessary, and in experienced hands, it can often be avoided.

    What to ask your doctor? Download patient guide.

    Conn's Syndrome - What to ask your doctor guide

    Conn’s Syndrome FAQs

    What does aldosterone do in the body?

    Aldosterone helps regulate blood pressure by managing the balance of sodium and potassium in your body. When there’s too much aldosterone, the body retains salt, loses potassium, and increases blood pressure.

    What causes Conn’s syndrome?

    Most commonly, Conn’s syndrome is caused by a benign tumor on one adrenal gland (an aldosterone-producing adenoma). It can also result from hyperplasia, where both adrenal glands are overactive.

    Can Conn’s syndrome be asymptomatic?

    Yes, some people have no obvious symptoms at first. However, even without symptoms, excess aldosterone still causes internal damage over time.

    Is it possible to have Conn’s syndrome with normal blood pressure?

    Yes, although it’s less common. Some individuals with Conn’s syndrome may have normal or borderline blood pressure but still experience symptoms like low potassium, muscle cramps, fatigue, or frequent urination. These patients are often overlooked, but they can still benefit from proper diagnosis and treatment. Blood pressure may rise over time if the condition goes unrecognized.

    What are the long-term risks of untreated Conn’s syndrome?

    Untreated Conn’s can lead to stroke, heart attack, heart failure, kidney damage, atrial fibrillation, and early death due to persistently high blood pressure and low potassium.

    Is Conn’s syndrome hereditary?

    Most cases are not hereditary, but a rare genetic form called familial hyperaldosteronism can run in families.

    Is Conn’s syndrome linked with a higher incidence of any other disease?

    Yes. Conn’s syndrome significantly increases the risk of serious cardiovascular and kidney-related diseases if left untreated. This includes stroke, heart attack, atrial fibrillation (irregular heartbeat), kidney disease, and even early death. Research also shows that patients with Conn’s syndrome are at higher risk for metabolic disorders compared to those with standard (essential) hypertension.

    My doctor says Conn’s is rare and that’s probably not what I have. Is that true?

    Conn’s syndrome is not rare—in fact, it’s one of the most common causes of secondary hypertension. Research shows that up to 10% of people with high blood pressure may have Conn’s syndrome, yet it remains underdiagnosed and under-recognized. If you have high blood pressure—especially if it’s difficult to control or you have low potassium—it’s important to rule out Conn’s syndrome, even if your doctor hasn’t considered it.

    What is the aldosterone-to-renin ratio?

    It’s the ratio between two hormones: aldosterone and renin. A high ARR suggests that aldosterone is being produced independently of the body's needs—a hallmark of Conn’s syndrome. Although values can vary by lab, a ratio above 20 (with aldosterone over 15 ng/dL) is often considered suspicious for Conn’s syndrome.

    Why is potassium often low in Conn’s syndrome?

    Excess aldosterone causes the kidneys to excrete too much potassium, which can lead to hypokalemia—causing muscle weakness, cramps, and fatigue.

    Can you have Conn’s syndrome with normal potassium?

    Yes. Many patients with Conn’s syndrome maintain normal potassium levels, which is why testing aldosterone and renin is critical—even without low potassium.

    What is the best treatment for Conn’s syndrome?

    The best and most definitive treatment for Conn’s syndrome is surgery to remove the adrenal tumor that is producing excess aldosterone. While medications can help manage symptoms like high blood pressure and low potassium, they do not cure the condition. Surgery addresses the root cause of the disease and offers long-term relief—and often, a complete cure. The most advanced and preferred surgical technique for Conn’s syndrome is the Mini Back Scope Adrenalectomy (MBSA), also known as the Mini Posterior Retroperitoneoscopic Adrenalectomy. This minimally invasive procedure removes the tumor through small incisions in the lower back, offering faster recovery, minimal pain, and excellent cosmetic results. When performed by an expert, a Mini Back Scope Adrenalectomy typically takes less than 20 to 30 minutes. The procedure is quick, safe, and highly effective in experienced hands. Visit www.adrenal.com to learn more. 


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