What is a common sign of High Altitude Cerebral Edema (HACE)?

Ataxia, which is a lack of voluntary coordination of muscle movements, is a common sign of High Altitude Cerebral Edema (HACE). HACE is characterized by swelling of the brain caused by exposure to high altitudes, typically above 8,000 feet (2,400 meters). As the condition progresses, it affects the brain's function, which may manifest as difficulty in walking or maintaining balance, ultimately leading to severe disorientation or confusion.

The presence of ataxia indicates that the brain is being impacted, and it can be an early warning sign of serious complications related to altitude sickness. In the context of wilderness medicine, recognizing ataxia alongside other symptoms is crucial for timely intervention, including descent to a lower altitude and medical attention.

Other symptoms like headaches, nausea, and shortness of breath may be present in various degrees of altitude sickness but are not definitive indicators of HACE. Ataxia stands out specifically as a red flag for this severe condition, highlighting the importance of careful monitoring of neurological signs in patients experiencing high altitude illness.