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August 19, 2026

Woman experiencing fatigue while trying to continue normal activities at home

Why Can an Infection Affect Your Health Long After the Infection Is Over?

Why Can an Infection Affect Your Health Long After the Infection Is Over? Symptoms can persist after the acute illness Infections may leave lasting biological changes The reason is not always the same You recover from an infection, but you do not feel like yourself again. Perhaps the fever and other obvious signs of the […]

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Woman resting after mental activity as symptoms worsen following physical or cognitive exertion.

Why Do Symptoms Worsen After Physical or Mental Activity?

Why Do Symptoms Worsen After Physical or Mental Activity? A delayed “crash” may represent post-exertional malaise Physical, cognitive, emotional, and upright activity can all be triggers The timing and duration of symptoms help guide evaluation Symptoms that worsen after physical or mental activity may reflect post-exertional malaise (PEM), also called post-exertional symptom exacerbation (PESE). This

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Patient and doctor reviewing medical records while discussing chronic symptoms

Why Can Chronic Symptoms Be So Difficult to Diagnose?

Why Can Chronic Symptoms Be So Difficult to Diagnose? Chronic symptoms may overlap across many conditions Tests can be normal or inconclusive while symptoms persist Sometimes the pattern becomes clearer only over time You have been tired for months. You are dizzy at times, your thinking feels slower, your muscles or joints hurt, and occasionally

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