Chronic fatigue syndrome (CFS) is a medical illness that causes excessive exhaustion or weariness that does not go away with rest and cannot be explained by an underlying medical condition. Chronic fatigue syndrome is also known as myalgic encephalomyelitis (ME) and systemic exertion intolerance illness (SEID). The causes of CFS are not completely known. Some ideas propose that the cause is a viral infection, psychological stress, or a combination of things. Chronic fatigue syndrome can … Continue reading CFS (Chronic Fatigue Syndrome): Symptoms + Treatments