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PubMed This is a summary of 23 peer-reviewed journal articles Updated
Pain Medicine

How Should Nociplastic Pain Be Managed During PEM Flares?

At a Glance

When nociplastic pain occurs with post-exertional malaise, use individualized pacing rather than pushing through. Stay within your changing energy limit, adjust activity when symptoms worsen, and work with a clinician to monitor whether pain treatment worsens fatigue or dizziness.

In this answer

4 sections

01

Post-Exertional Worsening vs. Normal Discomfort

02

Movement Without Fixed Quotas

03

Practical Strategies for Managing Your Energy

04

Medical Assessment and Medications

If you experience post-exertional malaise (PEM), managing your nociplastic pain—pain caused by altered processing in your nervous system [1]—requires a fundamental shift in how you approach activity. Instead of following a fixed exercise routine to “push through” the pain, you must use individualized energy management, often called pacing [2][3]. Because physical, mental, or emotional exertion can trigger prolonged flares of both pain and fatigue in people with PEM, an inflexible exercise plan can provoke symptom worsening [4][5]. Management must focus on staying within your body’s specific limits rather than trying to force your way past them.

Post-Exertional Worsening vs. Normal Discomfort

It is common for anyone starting a new physical routine to feel temporary muscle soreness. However, PEM is a distinct, multi-system reaction that is far more severe than ordinary exertion discomfort [6][7].

Understanding how PEM differs from typical soreness is crucial. Delayed-onset muscle soreness (DOMS) also happens hours after exercise, but it is typically limited to localized muscle ache. PEM is distinguished by:

  • Prolonged Recovery: While regular fatigue improves with rest, PEM episodes often last much longer. In one survey, 84% of respondents reported PEM lasting at least 24 hours, and flares can sometimes persist for days or weeks [8][6].
  • Widespread Symptoms: PEM is not just isolated muscle ache. It is a multisymptom flare that can include worsening widespread pain, severe exhaustion, cognitive difficulties (brain fog), sleep disturbances, flu-like symptoms, and dizziness [9][8]. Post-exercise pain spikes have been shown to be much worse 8 to 72 hours after the activity than they were immediately afterward [10].
Feature Ordinary Soreness (DOMS) Post-Exertional Malaise (PEM)
Symptom Type Localized muscle ache or stiffness Multisystem (pain, brain fog, flu-like, exhaustion) [9]
Onset 12 to 24 hours later Can be immediate, or delayed hours to the next day [11]
Impact on Function Annoying, but usually manageable Disproportionate loss of function and energy [6]

Movement Without Fixed Quotas

Having PEM does not mean all movement or physical therapy is unsafe. However, current medical consensus has shifted significantly away from graded exercise therapy (GET)—a program that requires patients to continuously increase their activity levels on a fixed schedule, regardless of how they feel.

The 2021 guidelines from the National Institute for Health and Care Excellence (NICE) explicitly state that programs based on fixed incremental increases in physical activity or exercise, including GET, should not be offered to people with ME/CFS [4]. Research shows that failing to account for a patient’s PEM during rehabilitation is linked to a higher risk of self-reported health deterioration [5]. Safe movement and rehabilitation must be flexible, individualized, and adjusted or stopped when symptoms worsen, focusing on safe function rather than pushing to meet a quota [12][13].

Practical Strategies for Managing Your Energy

When you have PEM, the goal is to find a balance of activity and rest that prevents post-exertional worsening [14][15].

  • Find Your Energy Envelope: This means figuring out how much activity you can safely do without triggering a delayed symptom flare [3]. Because your limits can change day-to-day, break tasks into smaller steps, use mobility aids if needed, and alternate demanding activities with easy ones.
  • Track Your Symptoms: Keeping a simple diary of your activities and your pain/fatigue levels can help you identify delayed patterns [3][16]. However, simplify or stop tracking if it becomes an exhausting chore itself.
  • Recognize Hidden Triggers: PEM can be triggered by mental tasks (like intense reading), emotional stress, sensory overload (bright lights or loud noises), and orthostatic stress (standing upright) [8][17][18].
  • During a Crash: If a PEM flare begins, pause nonessential exertion, reduce sensory demands, prioritize hydration and nutrition, and seek help with basic tasks. Do not try to “catch up” on missed activity once you start feeling better.

Medical Assessment and Medications

If you experience PEM, discuss this specific symptom with your doctor. PEM is a core defining feature of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) and can also occur in Long COVID [9][19]. While nociplastic pain conditions like fibromyalgia can overlap with ME/CFS, they are not the same thing, and you should be assessed for the full symptom pattern to determine the correct diagnosis [20][21].

For nociplastic pain, doctors may suggest centrally acting non-opioid medications, such as certain antidepressants or nerve pain medications [22][1]. It is important to know that these medications treat the pain—they do not treat or prevent PEM. Drug selection must be highly individualized. You and your doctor should closely monitor any new medications to ensure they do not worsen fatigue, sleep quality, or orthostatic intolerance (symptoms like severe dizziness or rapid heart rate when standing) [22][23]. Never start, stop, or change your medications without discussing it with your prescriber.

Safety Warning: Always seek urgent medical care for chest pain, severe or new shortness of breath, fainting, new neurological deficits, or an inability to keep fluids down. These are not typical PEM symptoms and require immediate evaluation.

Common questions in this guide

How should I manage nociplastic pain if activity causes post-exertional malaise?
Use pacing rather than pushing through: break activities into smaller steps, alternate demanding activities with easier ones, and stay within the amount of activity your body can tolerate without a delayed flare. Because your limits can change, adjust or stop movement when symptoms worsen and discuss a flexible plan with a clinician.
How can I tell post-exertional malaise from normal exercise soreness?
Ordinary delayed muscle soreness is usually localized and improves with rest. Post-exertional malaise can be delayed or immediate and causes a prolonged, multisystem flare with worse pain, severe fatigue, brain fog, sleep problems, flu-like symptoms, or dizziness.
Is graded exercise therapy appropriate when I have post-exertional malaise?
Fixed programs that require steadily increasing activity regardless of symptoms should not be offered to people with ME/CFS under 2021 NICE guidance. Movement or physical therapy may still be considered when it is flexible, individualized, and reduced or stopped if symptoms worsen.
Can medication for nociplastic pain prevent post-exertional malaise?
Certain antidepressants or nerve-pain medicines may be used to treat nociplastic pain, but they do not treat or prevent post-exertional malaise. A prescriber should monitor whether a new medicine worsens fatigue, sleep, dizziness, or a rapid heart rate when standing.
Should I be evaluated for ME/CFS if I have nociplastic pain and post-exertional malaise?
Post-exertional malaise is a core feature of ME/CFS, but having nociplastic pain or fibromyalgia does not by itself establish that diagnosis. A clinician can review your full symptom pattern and check for other causes of fatigue, dizziness, and worsening pain.
When should I seek urgent care during a post-exertional flare?
Seek urgent medical care for chest pain, severe or new shortness of breath, fainting, new neurological problems, or an inability to keep fluids down. These symptoms are not typical post-exertional malaise symptoms and require immediate evaluation.

Questions For You

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Related questions

Is Central Sensitization the Same as Nociplastic Pain? Can Nociplastic Pain Go Away or Improve Over Time? How Can I Manage Allodynia and Nociplastic Pain Safely? Does Nociplastic Pain Cause Damage, and Is Movement Safe? What Is Pain Neuroscience Education and Does It Work?
Show more
Can Nociplastic Pain Occur With Fibromyalgia, IBS, and More? Can You Have Nociplastic Pain With an Abnormal MRI? How Can I Improve Unrefreshing Sleep With Nociplastic Pain? How to Find a Safe, Evidence-Based Nociplastic Pain Clinic? How Is Nociplastic Pain Diagnosed After Other Causes? How Do I Start Exercise Safely With Nociplastic Pain? Pacing vs. Graded Exercise: Which Fits Nociplastic Pain? What Triggers Nociplastic Pain: Injury, Stress, Poor Sleep? Is Quantitative Sensory Testing Needed for Nociplastic Pain? What Should I Bring to a Nociplastic Pain Appointment? What Should I Do During a Nociplastic Pain Flare? Safe Steps Who Usually Treats Nociplastic Pain and Coordinates Care? Why Does My Nociplastic Pain Change Location and Intensity? Why Do Nociplastic Pain, Fatigue & Brain Fog Occur Together?

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Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Does my symptom pattern suggest I should be evaluated for ME/CFS or another condition that causes post-exertional malaise?
  2. 2.What other causes of fatigue, dizziness, or worsening pain should we check for?
  3. 3.How will we judge whether a medication or therapy is helping without triggering PEM?
  4. 4.If you recommend physical therapy, can you refer me to someone experienced in pacing and post-exertional malaise?
  5. 5.What is our action plan for when I experience a severe crash or flare?

References

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This page is for informational purposes only and does not constitute medical advice. A clinician should help assess your post-exertional malaise, pain, medications, and safe activity plan.