Q and A: about health and research

ME/CFS is often used as a broad diagnostic category, but in some cases underlying medical conditions may remain partially investigated or overlooked.    Commonly associated factors may include viral infections, post-exertional malaise (PEM), postural orthostatic tachycardia syndrome (POTS), fibromyalgia-like pain, immune or vascular abnormalities, neuroinflammation and/or encephalitis, possible glymphatic or lymphatic system dysfunction, and possible syringomyelia. Further research, including head and torso MRI imaging, comprehensive hematological and endocrinological testing, and evaluation of genetic or inherited markers, may help clarify underlying mechanisms and improve diagnostic understanding. At the same time, important conditions such as thyroid disease, adrenal insufficiency, lupus, hemophilia or other bleeding disorders, infections, vasculitis, and other systemic illnesses may not always be fully excluded and can coexist with or contribute to symptoms. The example...

A comprehensive list of possible illnesses or disorders that can be associated with exercise intolerance, grouped by category: Introduction Exercise intolerance refers to an abnormal or reduced capacity to perform physical activity. It commonly presents as excessive fatigue, shortness of breath, muscle weakness, or pain that is disproportionate to an individual's age, fitness level, or overall health status. Exercise intolerance is not a diagnosis in itself but rather a clinical sign that may indicate a broad range of underlying disorders. Potential causes include cardiovascular, respiratory, neuromuscular, metabolic, genetic, infectious, endocrine, and other systemic conditions. Before arriving at a definitive diagnosis or treatment plan, it is important to recognize that exercise intolerance is not always caused by disease alone. Certain lifestyle and nutritional factors can produce similar symptoms and should be assessed early in the clinical evaluation. Focus The list below cat...