Posterior Reversible Encephalopathy Syndrome (PRES)

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 6 min read
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Posterior Reversible Encephalopathy Syndrome (PRES) might sound like a mouthful, but it's actually a condition that affects the brain. It's important to understand what it is, what causes it, and how it can be treated. Imagine your brain as a control center for your body,...

For severe symptoms, danger signs, pregnancy, child illness, or sudden worsening, seek urgent medical care.

বাংলা রোগী নোট এখনো যোগ করা হয়নি। পোস্ট এডিটরে “RX Bangla Patient Mode” বক্স থেকে সহজ বাংলা সারাংশ যোগ করুন।

এই তথ্য শিক্ষা ও সচেতনতার জন্য। এটি ডাক্তারি পরীক্ষা, রোগ নির্ণয় বা প্রেসক্রিপশনের বিকল্প নয়।

Article Summary

Posterior Reversible Encephalopathy Syndrome (PRES) might sound like a mouthful, but it's actually a condition that affects the brain. It's important to understand what it is, what causes it, and how it can be treated. Imagine your brain as a control center for your body, sending and receiving messages to keep everything running smoothly. But sometimes, things can go wrong. That's where PRES comes in....

Key Takeaways

  • This article explains Causes of PRES in simple medical language.
  • This article explains Symptoms of PRES in simple medical language.
  • This article explains Diagnostic Tests for PRES in simple medical language.
  • This article explains Treatments for PRES in simple medical language.
Educational health guideWritten for patient understanding and clinical awareness.
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  • Chest pain, severe shortness of breath, fainting, or sudden severe weakness.
  • Sudden face drooping, arm weakness, speech trouble, confusion, or vision change.
  • A rapidly worsening condition or symptoms that feel life-threatening.
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Use emergency care for severe, sudden, rapidly worsening, or life-threatening symptoms.

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See a doctor

Book a professional medical evaluation if symptoms persist, worsen, recur often, affect daily activities, or occur in a high-risk patient.

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Definition

Posterior Reversible Encephalopathy Syndrome (PRES) might sound like a mouthful, but it’s actually a condition that affects the brain. It’s important to understand what it is, what causes it, and how it can be treated.

Imagine your brain as a control center for your body, sending and receiving messages to keep everything running smoothly. But sometimes, things can go wrong. That’s where PRES comes in.

PRES is a condition where parts of the brain swell. This swelling can cause all sorts of problems because it puts pressure on important areas that control things like vision, movement, and thinking.

Types of PRES

There’s only one type of PRES, but it can affect people differently depending on what causes it and how severe it is.

Causes of PRES

PRES can be caused by a variety of factors. Here are 20 common causes:

  1. High blood pressure
  2. Kidney problems
  3. Certain medications, like chemotherapy drugs
  4. Autoimmune disorders
  5. Infections, such as meningitis or sepsis
  6. Pregnancy-related complications, like eclampsia
  7. Organ transplants
  8. Head injuries
  9. Blood disorders
  10. Severe dehydration
  11. Drug abuse
  12. Chemotherapy
  13. Immunosuppressive drugs
  14. Systemic lupus erythematosus (SLE)
  15. Scleroderma
  16. Thrombotic thrombocytopenic purpura (TTP)
  17. Henoch-Schönlein purpura (HSP)
  18. Guillain-Barré syndrome
  19. Multiple sclerosis (MS)
  20. Cerebral vasculitis

Symptoms of PRES

How do you know if you have PRES? Look out for these 20 symptoms:

  1. Severe headaches
  2. Changes in vision, like blurriness or blind spots
  3. Seizures
  4. Confusion or disorientation
  5. Nausea and vomiting
  6. Difficulty speaking or understanding speech
  7. Weakness in arms or legs
  8. Changes in behavior
  9. Loss of consciousness
  10. Fatigue
  11. Problems with balance or coordination
  12. Sensitivity to light
  13. Hallucinations
  14. Memory loss
  15. Changes in personality
  16. Trouble concentrating
  17. Sleep disturbances
  18. Tremors or twitching
  19. Difficulty swallowing
  20. Paralysis

Diagnostic Tests for PRES

Doctors use a variety of tests to diagnose PRES. Here are 20 common ones:

  1. Magnetic Resonance Imaging (MRI) scan
  2. Computed Tomography (CT) scan
  3. Electroencephalogram (EEG)
  4. Blood tests
  5. Lumbar puncture (spinal tap)
  6. Urine tests
  7. Eye exams
  8. Neurological exams
  9. Kidney function tests
  10. Blood pressure monitoring
  11. Electrocardiogram (ECG or EKG)
  12. Doppler ultrasound
  13. X-rays
  14. Cerebral angiography
  15. Positron Emission Tomography (PET) scan
  16. Biopsy
  17. Genetic testing
  18. Serum magnesium level
  19. Serum calcium level
  20. Serum creatinine level

Treatments for PRES

Fortunately, there are ways to treat PRES and help relieve its symptoms. Here are 30 non-pharmacological treatments:

  1. Blood pressure management
  2. Intravenous fluids
  3. Seizure control
  4. Dialysis
  5. Plasmapheresis
  6. Corticosteroids
  7. Anti-seizure medications
  8. Anti-hypertensive medications
  9. infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">inflammation, pain, or swelling. সহজ বাংলা: প্রদাহ/ফোলা/ব্যথা কমায়।" data-rx-term="anti-inflammatory" data-rx-definition="Anti-inflammatory means reducing inflammation, pain, or swelling. সহজ বাংলা: প্রদাহ/ফোলা/ব্যথা কমায়।">Anti-inflammatory medications
  10. Calcium channel blockers
  11. Magnesium supplementation
  12. Rehabilitation therapy
  13. Speech therapy
  14. Occupational therapy
  15. Physical therapy
  16. Vision therapy
  17. Cognitive behavioral therapy
  18. Nutritional support
  19. Stress management techniques
  20. Sleep hygiene practices
  21. Lifestyle modifications (e.g., diet, exercise)
  22. Avoiding triggers (e.g., certain medications)
  23. Rest and relaxation
  24. Supportive care
  25. Counseling or psychotherapy
  26. Adaptive equipment (e.g., mobility aids)
  27. Environmental modifications
  28. Monitoring for complications
  29. Patient education and empowerment
  30. Caregiver support services

Drugs Used in PRES

Sometimes, medications are needed to help treat PRES. Here are 20 drugs commonly used:

  1. Antihypertensive drugs (e.g., labetalol)
  2. Antiseizure medications (e.g., levetiracetam)
  3. Corticosteroids (e.g., methylprednisolone)
  4. Anticoagulants (e.g., heparin)
  5. Vasodilators (e.g., nitroglycerin)
  6. Immunosuppressive drugs (e.g., cyclosporine)
  7. Antimicrobial agents (e.g., antibiotics)
  8. Antifungal medications (e.g., fluconazole)
  9. Antiviral drugs (e.g., acyclovir)
  10. Diuretics (e.g., furosemide)
  11. Analgesics (e.g., acetaminophen)
  12. Antiemetics (e.g., ondansetron)
  13. Sedatives (e.g., lorazepam)
  14. Muscle relaxants (e.g., baclofen)
  15. Neuroleptics (e.g., haloperidol)
  16. Dopamine agonists (e.g., pramipexole)
  17. Serotonin agonists (e.g., sumatriptan)
  18. Beta blockers (e.g., propranolol)
  19. Calcium channel blockers (e.g., verapamil)
  20. Magnesium sulfate

Surgeries for PRES

In some cases, surgery may be necessary to treat PRES. Here are 10 surgical procedures that may be performed:

  1. Craniotomy
  2. Ventriculostomy
  3. Shunt placement
  4. Decompressive hemicraniectomy
  5. Evacuation of hematoma or abscess
  6. Biopsy of brain tissue
  7. Stereotactic surgery
  8. Vagus nerve stimulation (VNS)
  9. Deep brain stimulation (DBS)
  10. Cortical resection or ablation

Preventions for PRES

While PRES can’t always be prevented, there are some steps you can take to reduce your risk. Here are 10 preventive measures:

  1. Maintain a healthy lifestyle
  2. Manage underlying health conditions
  3. Monitor blood pressure regularly
  4. Stay hydrated
  5. Follow medication instructions carefully
  6. Avoid illicit drugs and alcohol abuse
  7. Practice safe driving and wear seat belts
  8. Use protective gear during sports and recreational activities
  9. Seek prompt medical attention for any concerning symptoms
  10. Attend regular check-ups with healthcare providers

When to See a Doctor

If you experience any symptoms of PRES, it’s important to see a doctor right away. Don’t ignore warning signs like severe headaches, changes in vision, seizures, or confusion. Early detection and treatment can make a big difference in managing PRES and preventing complications.

In conclusion, while PRES may be a complex condition, understanding its causes, symptoms, diagnostic tests, treatments, and preventive measures can empower individuals to take control of their health and seek appropriate care when needed. By promoting awareness and accessibility to information, we can work towards improving outcomes for individuals affected by PRES.

 

Disclaimer: Each person’s journey is unique, treatment plan, life style, food habit, hormonal condition, immune system, chronic disease condition, geological location, weather and previous medical  history is also unique. So always seek the best advice from a qualified medical professional or health care provider before trying any treatments to ensure to find out the best plan for you. This guide is for general information and educational purposes only. If you or someone are suffering from this disease condition bookmark this website or share with someone who might find it useful! Boost your knowledge and stay ahead in your health journey. Thank you for giving your valuable time to read the article.

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Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Orthopedic / spine specialist, physical medicine doctor, or qualified clinician
Tests to discuss with doctor
  • Neurological examination for leg power, sensation, reflexes, and straight leg raise
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Questions to ask
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Safe pathway to proper treatment

Care roadmap for: Posterior Reversible Encephalopathy Syndrome (PRES)

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

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