Chronic Fatigue Secondary to PTSD

Overview

Chronic fatigue syndrome (CFS), also called myalgic encephalomyelitis (ME/CFS), is a long-term illness with substantially reduced function, post-exertional malaise, unrefreshing sleep, and cognitive problems or orthostatic intolerance (CDC). VA rates it under Diagnostic Code 6354 at 10% to 100%.

CFS and PTSD are strongly associated in research, but this is one of the harder secondary claims to win. VA’s definition of CFS requires ruling out other conditions that produce similar symptoms, and fatigue, poor concentration, and disturbed sleep are also features of PTSD and depression. A successful claim shows that the fatigue syndrome is distinct from the symptoms already counted in your PTSD rating, and that PTSD at least as likely as not caused or worsened it.

How Chronic Fatigue Syndrome Is Connected to PTSD

The research supports an association, not a settled causal mechanism:

• A 2014 meta-analysis of 71 studies found that people who reported trauma were 2.7 times more likely to have a functional somatic syndrome such as CFS, fibromyalgia, or IBS. The association was larger for PTSD than for physical or sexual abuse, and larger for CFS than for IBS or fibromyalgia (Afari et al., Psychosomatic Medicine). The authors noted the generally low quality of the underlying studies and called for prospective research.
• In 8,544 twins from the University of Washington Twin Registry, people reporting a history of PTSD were more than eight times as likely to report a history of CFS. The association held, though weaker, after accounting for shared family factors (Dansie et al., Psychosomatics, 2012).

Proposed pathways include long-term stress-system (HPA axis) and autonomic changes and chronic sleep disruption from nightmares and hyperarousal. These are plausible explanations a clinician can discuss, but they are hypotheses. A medical opinion should rely on your history and timeline, not on mechanism claims alone.

What the examiner looks at: whether you meet VA’s CFS definition, whether other causes (thyroid disease, anemia, sleep apnea, medication effects, depression) were ruled out, when the fatigue began relative to PTSD, and whether the fatigue is separate from symptoms already rated under PTSD. The exam is documented on the VA Chronic Fatigue Syndrome DBQ.

Evidence Requirements

• CFS diagnosis meeting VA’s definition. Under 38 CFR § 4.88a, VA requires (1) new onset of debilitating fatigue severe enough to reduce daily activity to less than 50% of the usual level for at least six months; (2) exclusion, by history, physical exam, and lab tests, of all other clinical conditions that may produce similar symptoms; and (3) six or more of: acute onset, low-grade fever, nonexudative pharyngitis, palpable or tender cervical or axillary lymph nodes, generalized muscle aches or weakness, fatigue lasting 24 hours or longer after exercise, headaches different from your pre-illness pattern, migratory joint pains, neuropsychologic symptoms, and sleep disturbance.
• Service-connected PTSD rating. Your rating decision letter.
• Medical opinion. A physician’s opinion that CFS is at least as likely as not caused or aggravated by PTSD, explaining why the fatigue is not simply a PTSD or depression symptom.
• Workup ruling out other causes. Thyroid tests, blood counts, metabolic panel, and a sleep study if sleep apnea is possible.
• Records of function and incapacitation. Notes documenting post-exertional malaise, activity limits compared with your pre-illness level, and any periods of physician-prescribed bed rest.
• Symptom log and lay statements. A log of activities, crashes after exertion, and recovery time, plus statements from family describing the change from your pre-illness functioning.

Rating Criteria

CFS is rated under DC 6354 (38 CFR § 4.88b) on “debilitating fatigue, cognitive impairments (such as inability to concentrate, forgetfulness, or confusion), or a combination of other signs and symptoms”:

• 10%: Symptoms that wax and wane but result in periods of incapacitation of at least one but less than two weeks total duration per year; or symptoms controlled by continuous medication.
• 20%: Symptoms that are nearly constant and restrict routine daily activities by less than 25 percent of the pre-illness level; or that wax and wane, resulting in periods of incapacitation of at least two but less than four weeks total duration per year.
• 40%: Symptoms that are nearly constant and restrict routine daily activities from 50 to 75 percent of the pre-illness level; or that wax and wane, resulting in periods of incapacitation of at least four but less than six weeks total duration per year.
• 60%: Symptoms that are nearly constant and restrict routine daily activities to less than 50 percent of the pre-illness level; or that wax and wane, resulting in periods of incapacitation of at least six weeks total duration per year.
• 100%: Symptoms that are nearly constant and so severe as to restrict routine daily activities almost completely and which may occasionally preclude self-care.

Incapacitation: For CFS, “incapacitation exists only when a licensed physician prescribes bed rest and treatment.” Days you stayed in bed without a physician’s order do not count toward the incapacitation-based levels, although they can still support the “nearly constant, restricts routine daily activities” levels.

Pyramiding and overlap with PTSD

38 CFR § 4.14 bars rating “the same manifestation under different diagnoses” and names fatigability as a symptom with many possible causes. The PTSD rating formula already includes chronic sleep impairment and memory and concentration problems, and the CFS criteria include cognitive impairment. VA will not count the same symptoms twice. Separate ratings are most defensible when CFS causes impairment the mental health rating does not capture, such as post-exertional malaise, physical activity restriction, muscle and joint pain, and physician-prescribed bed rest. If a clinician concludes the fatigue is really one disability with both physical and mental diagnoses, 38 CFR § 4.126(d) rates it under the code for the more disabling aspect.

C&P Exam Tips

• Attend in your usual state. Don’t push yourself to look more functional, and don’t overexert yourself beforehand either.
• Describe post-exertional malaise concretely. What activity triggers a crash, how soon it starts, and how many hours or days recovery takes.
• Compare your activity to before the illness. For example, hours worked, household tasks, or exercise then versus now. The 20% to 60% levels are based on this comparison.
• Describe typical days and bad days accurately, including how often bad days occur.
• Separate CFS symptoms from PTSD symptoms as best you can. Physical exhaustion after exertion is different from poor sleep caused by nightmares.
• Bring records of any physician-prescribed bed rest, your lab workup, and your symptom log.

Nexus Letter Tips

• Who. A physician who has examined you and knows the CFS diagnostic criteria, such as an internist or rheumatologist. A psychiatrist’s input on the PTSD history can complement it.
• Standard. CFS is “at least as likely as not” (50% or greater probability) caused or aggravated by service-connected PTSD, the benefit-of-the-doubt standard VA applies (38 CFR § 3.102).
• What to address:
  • How you meet each element of 38 CFR § 4.88a, including which of the ten signs and symptoms are present
  • The workup that excluded other causes
  • The timeline of fatigue onset relative to PTSD
  • Why the fatigue is not simply a PTSD or depression symptom
  • The research on trauma, PTSD, and CFS (for example, Afari 2014 and Dansie 2012), presented as association, not proof
  • If CFS predated or developed independently of PTSD, the baseline severity and how PTSD worsened it (38 CFR § 3.310(b))

Impact on Combined Rating

If VA grants a separate CFS rating, it combines with your PTSD rating using VA math (38 CFR § 4.25). The table uses whole numbers at each step, and only the final value is rounded to the nearest 10.

Example at 10%: 70% PTSD and 10% CFS.

1. Start with 70%: 30% remaining
2. 10% of 30 = 3, combined value 73
3. Rounded: 70% combined

Example at 40%: 70% PTSD and 40% CFS.

1. Start with 70%: 30% remaining
2. 40% of 30 = 12, combined value 82
3. Rounded: 80% combined

Example with tinnitus: 70% PTSD, 40% CFS, and 10% tinnitus.

1. 70 and 40 combine to 82 (18 remaining)
2. 10% of 18 = 1.8, combined value 84 (the table rounds 83.8 to 84)
3. Rounded: 80% combined

Use our VA disability calculator to see how a CFS rating would affect your combined rating.

For personalized guidance on your VA disability claim, consult a VA-accredited VSO, attorney, or claims agent.