Many disabling conditions do not follow a steady pattern. Instead, symptoms come and go in cycles—sometimes improving for weeks, then returning suddenly with severe intensity. These are known as intermittent or episodic illnesses.
Examples include multiple sclerosis, lupus, fibromyalgia, epilepsy, and certain mental health disorders.
SSA’s Main Challenge with Fluctuating Conditions
The Social Security Administration (SSA) does not deny claims simply because symptoms are not constant. However, they do focus heavily on frequency, duration, and severity of flare-ups.
A key question becomes: even if symptoms improve at times, do they prevent consistent full-time work?
Episodic Disability Standard
SSA evaluates whether:
- Episodes are frequent enough to disrupt employment
- Recovery periods are unpredictable
- Symptoms cause repeated absences or reduced productivity
Even if a person can function on “good days,” inability to maintain regular attendance can support disability approval.
What Evidence Matters Most
Strong claims include:
- Emergency visits during flare-ups
- Treatment adjustments over time
- Specialist documentation of episodic patterns
- Work history showing repeated absences or job loss
Common Pitfalls
Claims often fail when:
- Only “good day” functioning is documented
- Flare-ups are not medically recorded
- There is inconsistent treatment history
Intermittent illnesses are valid under SSDI rules, but success depends on proving that flare-ups make sustained employment unreliable—not just difficult.
