Chronic Fatigue Syndrome (CFS) is a debilitating condition that affects millions of people worldwide. Also known as Myalgic Encephalomyelitis (ME), it is a complex illness that causes severe fatigue, along with other symptoms such as muscle pain, headaches, and memory problems. Other synonyms for CFS include Systemic Exertion Intolerance Disease (SEID), Chronic Fatigue Immune Dysfunction Syndrome (CFIDS), and Post-Viral Fatigue Syndrome (PVFS). While the exact cause of CFS remains unknown, it is believed to be triggered by viral infections, immune system dysfunction, or hormonal imbalances. CFS is a challenging condition to live with, and those affected by it require ongoing medical care and support.