high-altitude sickness
Climber's elevation illness
High-altitude sickness is a condition caused by reduced oxygen at elevations typically above 8,000 feet, marked by headache, nausea, fatigue, and shortness of breath.
Severe cases can involve fluid in the lungs or brain.
The condition affects climbers, hikers, and travelers who ascend too quickly without acclimatizing: We descended when she showed signs of high-altitude sickness.
- thin airSeeming nothingness
- hyperventilationAbnormally rapid respiration
- hypoxiaInsufficient tissue oxygenation
- oxygen deprivationInsufficient breathable gas supply
- mountain climbingAscending peaks on foot
base camp · fluid retention · slow ascent · vasodilation · acclimatization · summit fever · breathing exercises · supplemental oxygen · headache · pulmonary edema
high-altitude sicknessdecompression sickness
Gas bubbles from pressure change
the bends · nitrogen narcosis · oxygen toxicity · barotrauma
high-altitude sicknessseasickness
Nausea from boat motion
motion sickness · car sickness · airsickness · heat stroke · heat exhaustion
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