Altitude sickness is illness caused by thin air high in the mountains. Suffer altitude sickness.
Fitness makes no difference at all, which catches out exactly the people you would expect. The only reliable cure for altitude sickness is to go down, and to do it quickly.
1nounaltitude sicknessIllness caused by thin air high in the mountains.
“Altitude sickness turned him back at four thousand metres.”
altitude sickness is an illness.
Practised in Camping & Outdoors, Airport & Flying