Primary Hyperaldosteronism

Overview

Primary hyperaldosteronism is a hormone-related condition in which the adrenal glands produce too much aldosterone. The adrenal glands are small glands located above the kidneys. Aldosterone helps the body regulate blood pressure by controlling the balance of salt and water, as well as potassium levels in the blood.

When aldosterone levels are too high, the body may retain too much salt and water and lose too much potassium. This can lead to high blood pressure and, in some people, low potassium levels. Primary hyperaldosteronism is an important and potentially treatable cause of high blood pressure. It is managed by specialists in endocrinology, often in cooperation with cardiology, nephrology, radiology, and surgery teams when needed.

Symptoms

Many people with primary hyperaldosteronism do not notice specific symptoms, especially in the early stages. The condition is often suspected when high blood pressure is difficult to control or when routine blood tests show low potassium.

Possible symptoms and signs may include:

• High blood pressure, sometimes requiring several medications to control
• Headaches
• Muscle weakness or cramps
• Fatigue or reduced energy
• Increased thirst or frequent urination
• Heart palpitations or an irregular heartbeat sensation
• Numbness or tingling in some cases

These symptoms can have many different causes. Having them does not necessarily mean a person has primary hyperaldosteronism, but they may indicate the need for medical evaluation.

Causes and Risk Factors

Primary hyperaldosteronism occurs when the adrenal glands make excess aldosterone independently of the body’s normal control systems. The most common causes are an overactive area in one adrenal gland or overactivity in both adrenal glands. Less commonly, it may be related to inherited forms or other adrenal conditions.

Risk factors and situations that may raise suspicion include:

• High blood pressure that develops at a younger age
• High blood pressure that is difficult to control
• High blood pressure together with low potassium levels
• High blood pressure and an adrenal nodule found on imaging
• A family history of early-onset high blood pressure or certain adrenal conditions
• High blood pressure associated with episodes of muscle weakness, cramps, or abnormal heart rhythm sensations

Because primary hyperaldosteronism affects blood pressure and mineral balance, identifying it is important for long-term heart, blood vessel, and kidney health.

Diagnosis

Diagnosis begins with a medical history, physical examination, and review of blood pressure patterns and previous test results. Doctors may ask about medications, family history, symptoms, and any history of low potassium.

Initial testing usually involves blood tests to measure aldosterone and renin, two hormones involved in blood pressure regulation. The relationship between these hormone levels can suggest whether primary hyperaldosteronism may be present. Blood potassium and kidney function are also commonly checked.

If screening tests suggest the condition, further confirmatory testing may be recommended. These tests are performed under medical supervision because factors such as salt intake, posture, time of day, kidney function, and certain medications can affect results.

Imaging, such as a scan of the adrenal glands, may be used to look for adrenal nodules or enlargement. However, imaging alone may not show which adrenal gland is producing excess aldosterone. In selected cases, a specialized procedure called adrenal vein sampling may be used to compare hormone production from each adrenal gland. This helps guide treatment decisions, especially if surgery is being considered.

Treatment Options

Treatment depends on the cause, the patient’s overall health, blood pressure level, potassium level, and whether one or both adrenal glands are involved. The goals are to control blood pressure, normalize potassium when needed, reduce the effects of excess aldosterone, and lower the risk of long-term complications.

If excess aldosterone comes mainly from one adrenal gland, surgery to remove that gland may be considered. This decision is made after careful testing and discussion with an endocrinologist and surgical team. Surgery may improve hormone balance and blood pressure control, but individual results vary.

If both adrenal glands are overactive, or if surgery is not suitable or not preferred, treatment usually involves medicines that block the effects of aldosterone. These medicines require medical monitoring, including blood pressure checks and blood tests for potassium and kidney function.

Lifestyle measures may also be recommended as part of overall blood pressure care. These can include a balanced diet, attention to salt intake, regular physical activity when appropriate, maintaining a healthy weight, limiting alcohol, and avoiding tobacco. Such measures should be personalized and discussed with a healthcare professional, especially for people with kidney, heart, or other medical conditions.

When to See a Doctor

Medical advice is recommended for anyone with high blood pressure, particularly if it is difficult to control, occurs at a young age, or is associated with low potassium. A doctor should also be consulted if there are symptoms such as persistent muscle weakness, cramps, unusual fatigue, frequent urination, excessive thirst, or palpitations.

Urgent medical care is needed for severe chest pain, shortness of breath, fainting, sudden weakness or numbness, confusion, severe headache, or signs of stroke or heart-related emergency.

For international patients, evaluation by an endocrinology team can help clarify whether primary hyperaldosteronism is present and which treatment approach is most appropriate. Early assessment and structured follow-up can support safer blood pressure management and overall health.