Adrenal insufficiency
What is Adrenal insufficiency?
Adrenal insufficiency is a condition where your adrenal glands do not produce enough hormones. Your adrenal glands are small organs that sit on top of your kidneys. They make cortisol and other hormones that help your body respond to stress, regulate blood pressure, and control metabolism.
When these glands fail to work properly, your body struggles to maintain normal functions. Cortisol helps you wake up in the morning, manage stress, fight infections, and keep your blood sugar stable. Without enough cortisol, you may feel exhausted, weak, and unable to handle everyday challenges.
This condition can develop when the pituitary gland in your brain does not send enough signals to your adrenal glands. The pituitary makes a hormone called ACTH that tells your adrenal glands to produce cortisol. Low ACTH levels mean low cortisol levels, which creates serious health problems if left untreated.
Symptoms
- Extreme fatigue and weakness that does not improve with rest
- Weight loss and decreased appetite
- Low blood pressure that may cause dizziness when standing
- Nausea, vomiting, and abdominal pain
- Salt cravings and increased thirst
- Muscle and joint pain
- Darkening of the skin, especially in skin folds and scars
- Low blood sugar levels
- Mood changes, irritability, and depression
- Headaches and confusion
Some people have mild symptoms that develop slowly over months or years. Others may not notice problems until a stressful event like illness or injury triggers a sudden worsening of symptoms.
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Causes and risk factors
Adrenal insufficiency can happen when the pituitary gland in your brain becomes damaged or diseased. This gland normally produces ACTH, which signals your adrenal glands to make cortisol. When the pituitary fails to make enough ACTH, your adrenal glands shrink and stop producing adequate hormones. Common causes include pituitary tumors, brain surgery, radiation therapy to the head, traumatic brain injury, and autoimmune conditions that attack the pituitary gland.
Risk factors include long-term use of steroid medications like prednisone, which can suppress your natural hormone production. Suddenly stopping these medications without tapering can trigger adrenal crisis. Other risk factors include autoimmune diseases, infections like tuberculosis, bleeding into the adrenal glands, and genetic conditions that affect hormone production. Chronic stress and poor nutrition may worsen symptoms but typically do not cause the condition on their own.
How it's diagnosed
Doctors diagnose adrenal insufficiency through blood tests that measure hormone levels. The most important test measures ACTH levels to determine whether your pituitary gland is sending proper signals to your adrenal glands. Low ACTH levels combined with low cortisol suggest a pituitary problem. Your doctor may also check your cortisol levels at different times of day since cortisol naturally rises and falls throughout the day.
Rite Aid offers ACTH plasma testing as an add-on to our flagship panel. This test helps identify whether your pituitary gland is functioning properly. Your doctor may order additional tests like an ACTH stimulation test, which checks how well your adrenal glands respond when given synthetic ACTH. Early testing is essential because untreated adrenal insufficiency can lead to life-threatening complications.
Treatment options
- Hormone replacement therapy with hydrocortisone or prednisone to replace missing cortisol
- Taking medication at the same times each day to mimic your body's natural hormone rhythm
- Increasing medication doses during illness, injury, or stressful situations
- Wearing a medical alert bracelet that identifies your condition in emergencies
- Eating regular meals to maintain stable blood sugar levels
- Increasing salt intake if your doctor recommends it for low blood pressure
- Managing stress through adequate sleep, gentle movement, and relaxation techniques
- Working with an endocrinologist who specializes in hormone disorders
- Keeping emergency injectable cortisol on hand for adrenal crisis situations
- Regular blood tests to monitor hormone levels and adjust medications
Need testing for Adrenal insufficiency? Add it to your panel.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
Primary adrenal insufficiency happens when the adrenal glands themselves are damaged and cannot produce hormones. Secondary adrenal insufficiency occurs when the pituitary gland fails to make enough ACTH, which then causes the adrenal glands to stop working properly. Secondary adrenal insufficiency is more common and often results from long-term steroid use or pituitary problems.
Most cases of adrenal insufficiency require lifelong hormone replacement therapy. The condition itself cannot be cured, but it can be managed effectively with daily medication. Some people who developed secondary adrenal insufficiency from steroid use may recover normal function after their medications are carefully tapered. Working closely with your doctor helps you find the right treatment plan.
An adrenal crisis is a life-threatening emergency that happens when cortisol levels drop too low. Symptoms include severe weakness, confusion, severe pain, very low blood pressure, and loss of consciousness. This can occur during illness, injury, surgery, or if you miss your medication doses. Immediate medical treatment with injectable cortisol is necessary to prevent death.
ACTH blood tests measure the hormone your pituitary gland sends to your adrenal glands. Low ACTH levels combined with low cortisol indicate secondary adrenal insufficiency from pituitary problems. High ACTH levels with low cortisol suggest primary adrenal insufficiency where the adrenal glands themselves are damaged. This test helps doctors determine the root cause of your symptoms.
Eating regular balanced meals helps maintain stable blood sugar and energy levels. Getting adequate sleep and managing stress reduces the demand on your already struggling adrenal system. Avoiding alcohol and staying hydrated supports overall health. However, lifestyle changes alone cannot treat this condition, and hormone replacement medication is always necessary.
Your adrenal glands normally produce aldosterone, a hormone that helps your kidneys retain sodium and maintain blood pressure. When adrenal function is impaired, you may lose too much sodium through urine. Your body responds by creating salt cravings to replace what is being lost. Some people need to increase dietary salt intake under medical supervision.
Chronic stress does not cause adrenal insufficiency, though this is a common myth. The condition results from actual damage to your pituitary or adrenal glands, not from being too busy or overwhelmed. However, physical stress from illness or injury can worsen symptoms in people who already have the condition. People with adrenal insufficiency need to increase their medication during stressful events.
Your doctor will determine the right testing schedule based on your symptoms and treatment response. Most people need testing when first diagnosed and then periodically to monitor treatment effectiveness. You may need more frequent testing if your symptoms change or your medication dose is adjusted. Regular monitoring helps ensure your hormone levels stay in a healthy range.
Steroid medications like prednisone, dexamethasone, and hydrocortisone can suppress your natural hormone production when used long-term. Your pituitary gland stops making ACTH because it senses enough cortisol from the medication. When you stop taking steroids suddenly, your adrenal glands may not restart quickly enough. Always taper steroids slowly under medical supervision to prevent this problem.
Yes, gentle to moderate exercise is generally safe and beneficial for overall health. However, you may need to adjust your medication dose before intense workouts or athletic events. Listen to your body and avoid pushing through extreme fatigue. Work with your doctor to create an exercise plan that matches your energy levels and hormone replacement needs.