High Blood Pressure? Why Your Aldosterone Is High + Medically Approved Next Steps

If you've been told you have high blood pressure (hypertension), you may have heard your doctor mention a hormone called aldosterone. While it's not as commonly discussed as sodium or stress, aldosterone plays a powerful role in controlling blood pressure.

When aldosterone levels are too high, your blood pressure can rise — sometimes significantly.

Here's what that means, why it happens, and what you can safely do next.

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What Is Aldosterone?

Aldosterone is a hormone made by your adrenal glands, which sit on top of your kidneys. Its main job is to:

• Help regulate blood pressure
• Control sodium (salt) levels
• Balance potassium
• Manage fluid levels in your body

It works by telling your kidneys to:

• Hold on to sodium
• Release potassium
• Retain water

When sodium and water are retained, your blood volume increases — and that raises blood pressure.

In healthy amounts, aldosterone is essential. But when levels are too high, problems can develop.

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How High Aldosterone Causes High Blood Pressure

When aldosterone is elevated, your body:

• Retains too much sodium
• Loses too much potassium
• Holds on to excess fluid

This combination can cause:

• Persistent high blood pressure
• Swelling (sometimes)
• Low potassium levels
• Increased strain on the heart and blood vessels

Importantly, aldosterone-related hypertension often does not improve easily with standard blood pressure medications unless the underlying hormone imbalance is addressed.

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Why Is Your Aldosterone High?

High aldosterone levels can happen for several reasons. The most common cause is:

1. Primary Aldosteronism (Conn's Syndrome)

This condition occurs when the adrenal glands produce too much aldosterone independently of the body's needs.

It can be caused by:

• A benign adrenal tumor (adrenal adenoma)
• Enlargement of both adrenal glands (bilateral hyperplasia)

Primary aldosteronism is more common than once believed. Some research suggests it may account for 5–10% of hypertension cases, and even higher percentages in people with resistant hypertension.

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2. Secondary Aldosteronism

In this case, something else in the body triggers excess aldosterone production. Causes include:

• Chronic kidney disease
• Narrowing of kidney arteries (renal artery stenosis)
• Severe dehydration
• Heart failure
• Liver disease

Here, aldosterone is reacting to another underlying problem.

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3. Long-Standing High Blood Pressure

Chronic hypertension itself can stimulate hormone systems (like the renin-angiotensin-aldosterone system) that increase aldosterone production.

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Symptoms of High Aldosterone

Many people with elevated aldosterone have no obvious symptoms, which is why hypertension is often called the "silent" condition.

However, signs may include:

• Persistent high blood pressure
• Muscle weakness
• Fatigue
• Headaches
• Excessive thirst
• Frequent urination
• Heart palpitations
• Low potassium levels on blood tests

Low potassium (hypokalemia) is a major clue. But not everyone with high aldosterone has low potassium — so normal potassium doesn't rule it out.

If you're experiencing any of these symptoms and want to understand whether they may be linked to Hypertension, a quick and free AI-powered symptom assessment could provide helpful insights before your next doctor's appointment.

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Who Should Be Tested for High Aldosterone?

Medical guidelines recommend screening for primary aldosteronism if you have:

• Blood pressure consistently above 150/100
• High blood pressure requiring 3 or more medications
• Hypertension plus low potassium
• High blood pressure at a young age
• A family history of early stroke or hypertension
• An adrenal mass found incidentally

Testing usually involves:

• Blood tests measuring aldosterone and renin
• A calculation called the aldosterone-to-renin ratio (ARR)

If screening suggests a problem, further confirmatory testing may be needed.

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Why It's Important Not to Ignore High Aldosterone

Untreated excess aldosterone doesn't just raise blood pressure. It may also:

• Increase risk of stroke
• Raise heart attack risk
• Contribute to heart enlargement
• Increase risk of atrial fibrillation
• Worsen kidney damage

Research shows that people with primary aldosteronism may have higher cardiovascular risk than those with regular essential hypertension at the same blood pressure level.

The good news: when treated properly, risks can improve significantly.

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Medically Approved Next Steps

If your aldosterone is high, the next steps depend on the cause.

1. Confirm the Diagnosis

Your doctor may order:

• Repeat hormone testing
• Salt-loading tests
• Imaging (CT scan of adrenal glands)
• Specialized adrenal vein sampling (in select cases)

These help determine whether one or both adrenal glands are overproducing aldosterone.

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2. Medication Treatment

If surgery is not needed or not appropriate, medications can help block aldosterone's effects.

Common options include:

• Spironolactone
• Eplerenone

These are called mineralocorticoid receptor antagonists. They:

• Lower blood pressure
• Protect the heart
• Normalize potassium levels

They are often very effective when aldosterone is the root cause.

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3. Surgical Treatment (If Appropriate)

If a single adrenal gland has a benign tumor producing excess aldosterone, surgery to remove that gland may:

• Normalize blood pressure
• Reduce medication needs
• Correct potassium levels

Many patients see major improvement after surgery.

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4. Lifestyle Adjustments That Support Treatment

Even with hormonal causes, lifestyle matters.

Evidence-based strategies include:

• Reducing sodium intake (aim for less than 2,300 mg per day, or lower if advised)
• Maintaining a healthy weight
• Regular aerobic exercise (150 minutes per week)
• Limiting alcohol
• Avoiding smoking
• Managing stress

These changes support both hormone balance and overall cardiovascular health.

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When to Speak to a Doctor Urgently

High blood pressure can become dangerous if severe.

Seek urgent medical care if you experience:

• Chest pain
• Shortness of breath
• Sudden severe headache
• Vision changes
• Weakness on one side of the body
• Confusion
• Blood pressure readings above 180/120

These could signal a hypertensive emergency or stroke.

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The Bottom Line

Aldosterone plays a critical role in blood pressure control. When levels are too high, it can lead to persistent or resistant hypertension and increase cardiovascular risk.

The key points to remember:

• High aldosterone is more common than once thought.
• It's a treatable cause of high blood pressure.
• Proper diagnosis matters.
• Medication or surgery can significantly reduce risk.
• Lifestyle changes still play an important role.

If you've been struggling to control your blood pressure — especially if you need multiple medications or have low potassium — it's reasonable to ask your doctor whether aldosterone testing is appropriate.

And if you're unsure whether your symptoms point toward hypertension, consider completing a free online Hypertension symptom assessment to help you identify potential warning signs and prepare for a more informed conversation with your healthcare provider.

Most importantly, speak to a doctor about any concerns related to high blood pressure, elevated aldosterone, or symptoms that feel severe or unusual. Hypertension can be serious — but with the right diagnosis and treatment, it is very manageable.

Early action makes a difference.