sudden adrenal
Informed by recognized medical guidance
Overview
A sudden adrenal crisis (also called acute adrenal insufficiency) happens when the adrenal glands stop making enough cortisol, a hormone that helps your body respond to stress. This is a medical emergency that needs immediate treatment.
Key facts
- The adrenal glands are small organs on top of each kidney.
- Cortisol is vital for managing stress, blood pressure, and blood sugar.
- A sudden adrenal crisis can be life-threatening if not treated quickly.
Sudden adrenal crisis is rare, but it can be very serious. People who already have adrenal insufficiency are at higher risk.
It most often affects people who have been diagnosed with adrenal insufficiency (like Addison's disease), people taking long-term steroid medicines, or those with certain infections or injuries.
Symptoms
- Fainting or passing out
- Severe vomiting that won't stop
- Very low blood pressure (feeling faint, cold, clammy)
- Severe confusion or difficulty waking up
- Seizure or convulsions
- ⚠Worsening weakness or dizziness
- ⚠Increased nausea or vomiting
- ⚠Signs of infection (fever, chills) if you have adrenal insufficiency
- ⚠Need to adjust your sick-day medication according to your plan
Common symptoms
- Severe weakness or tiredness
- Dizziness or lightheadedness, especially when standing
- Nausea, vomiting, or belly pain
- Diarrhea
- Loss of appetite
- Salt craving
- Low blood pressure
- Confusion or drowsiness
Symptoms in children
- Poor feeding or weight loss
- Vomiting, often with diarrhea
- Very low energy or sleeping more than usual
- Dehydration (fewer wet nappies, dry mouth)
Symptoms in older adults
- Confusion that gets worse
- Falls or feeling unsteady
- Very low blood pressure
- Less interest in food or drink
- Agitation or withdrawal
Causes
Main causes
- Abruptly stopping long-term steroid medicines without medical supervision
- Damage to the adrenal glands from autoimmune disease, infection, or bleeding
- Damage to the pituitary gland (which helps control the adrenal glands)
- Sudden stress such as surgery, injury, or infection in someone with adrenal insufficiency
Risk factors
- Taking corticosteroid medicines for a long time
- Having Addison's disease or other adrenal insufficiency
- Major physical stress like surgery, trauma, or infection
- A previous adrenal crisis or sudden withdrawal of steroids
When to see a doctor
See a doctor urgently if:
- If you have signs of sudden adrenal crisis, call your local emergency number immediately.
- If you have known adrenal insufficiency and feel very sick, follow your sick-day plan and get urgent medical care.
Book a routine appointment if:
- If you have new or worsening symptoms like fatigue, dizziness, or nausea, make an appointment with your doctor.
- If you take steroid medicines and have questions about how to adjust them during illness, talk to your healthcare team.
Diagnosis
Doctors diagnose sudden adrenal crisis based on your symptoms, medical history, and blood tests. It is usually diagnosed in an emergency setting because it needs fast treatment.
Tests that may be done
- Blood cortisol level
- ACTH stimulation test (a check of how well your adrenal glands respond)
- Electrolyte tests (sodium, potassium)
- Blood glucose (sugar)
- Imaging of the adrenal glands (such as a CT scan) if needed
What to expect at your appointment
You will likely have an IV line placed quickly for fluids and medicines. Your doctor will monitor your blood pressure and blood test results. You may stay in the hospital until you are stable.
Treatment
Treatment for sudden adrenal crisis is given in the hospital. It involves replacing the missing hormones and fluids quickly, then finding and fixing the cause.
Self-care at home
- For people at risk, always carry your emergency injection kit as prescribed and know how to use it.
- Wear a medical alert bracelet or necklace that says 'adrenal insufficiency' or 'on steroids'.
- Follow your doctor's 'sick day' plan, which may include adjusting your steroid medicine during illness — only as directed by your healthcare team.
Medical treatments
Emergency treatment includes intravenous fluids, glucose, and immediate steroid replacement. Long-term treatment involves taking replacement hormones every day to keep your adrenal function stable. Your doctor will teach you how to adjust them during times of stress or illness.
When is surgery considered?
Surgery is rarely needed for adrenal crisis itself. It may be used if there is an underlying problem like bleeding or a tumor in the adrenal glands that requires surgical removal.
Living with this condition
If you have adrenal insufficiency, you can manage it by taking your medicines exactly as prescribed, keeping regular check-ups, and planning ahead for stressful times. Always inform doctors and dentists about your condition before any procedure.
Lifestyle tips
- Keep a written sick-day plan provided by your healthcare team.
- Carry an emergency kit with any injectable medicine your doctor prescribes.
- Always have extra medication when traveling.
- Tell close family or friends how to help in an emergency.
Diet and exercise
Eat a balanced diet with enough salt, especially in hot weather or after sweating. Exercise is safe and good for you, but you may need to adjust your medicine if you do intense or long activities. Talk to your healthcare team about how to manage.
Mental health and emotional wellbeing
Living with a condition that can suddenly become serious may cause anxiety or stress. It is normal to feel worried. Talking to a counselor or joining a support group can help you cope.
Prevention
For people at risk, the best prevention is careful management of adrenal insufficiency. This includes not stopping steroids suddenly, following a sick-day plan, and getting early medical care for infections or stress.
Vaccines
Getting recommended vaccines (ask your doctor which ones you need) can help prevent infections that might trigger a crisis.
Screening programmes
There is no routine screening for the general public. If you have symptoms or a family history of adrenal disease, your doctor may test your cortisol levels.
Complications
If left untreated
- Shock (when blood pressure drops to a dangerous level)
- Seizure
- Coma
- Death
Long-term outlook
With prompt emergency care, most people recover fully and can go back to their usual activities. They continue to manage their condition with daily medicine and regular medical check-ups. Life expectancy is normal for people who follow their treatment plan.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
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Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 31, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.