Quick Answer
Altitude sickness can occur while traveling by air, especially on long flights, but it is less common than expected. Symptoms typically appear after descending to a lower altitude, rather than ascending to a higher one. Mild cases can be treated with rest and hydration.
Cause and Contributing Factors
Altitude sickness can occur during air travel due to several factors, including rapid changes in air pressure, oxygen levels, and humidity. On long flights, the cabin pressure may not be sufficient to prevent the onset of altitude sickness, especially if the flight is above 8,000 feet (2,438 meters). Additionally, people with pre-existing medical conditions, such as heart or lung disease, may be more susceptible to altitude sickness.
Symptoms and Treatment
Mild altitude sickness symptoms, such as headaches, fatigue, and nausea, can be treated with rest, hydration, and over-the-counter pain medications like ibuprofen or acetaminophen. In severe cases, symptoms can progress to acute mountain sickness (AMS), high-altitude pulmonary edema (HAPE), or high-altitude cerebral edema (HACE), which require immediate medical attention. Symptoms typically develop within 12-24 hours after descent to a lower altitude.
Prevention and Precautions
To minimize the risk of altitude sickness during air travel, it is essential to drink plenty of water and avoid dehydration. Avoiding heavy meals before flying can also help prevent discomfort during the flight. Additionally, some airlines offer oxygen masks, which can be beneficial for passengers who experience altitude sickness symptoms. If you have a history of altitude sickness or are prone to respiratory or cardiac issues, consult your doctor before flying.
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