Chronic Mountain Sickness

Chronic Mountain Sickness (CMS) is a condition that develops in individuals living at altitudes above 10,000 feet (3,000 meters) for extended periods, characterized by an overproduction of red blood cells (polycythaemia) leading to thickened blood and low oxygen levels (hypoxemia). Common symptoms include headache, dizziness, breathlessness, fatigue, and sleep disturbances.