The Travel Doctor - Altitude Sickness

Significant altitude illness can affect people as low as 8000 feet; most persons will experience some symptoms at even lower altitudes if they exert themselves before becoming acclimatized. Altitude illness is caused by a diminished supply of oxygen at higher elevations.

The incidence of altitude illness depends on the rate of ascent. Rapid ascents can result in acute mountain sickness (AMS). Tourists to high-altitude destinations may experience rapid and significant changes in altitude, reaching an altitude of 12,000 feet or more within a day after leaving a comfortable low altitude. This rapid ascent predisposes them to AMS.

Slow ascent is the key of effective acclimatization and prevention of serious illness. The altitude at which the climber sleeps is the most important factor. If possible, try to avoid sleeping above 10,000 feet the first night. While at a high altitude, travelers should eat a moderate carbohydrate diet with complex carbohydrate supplements. Avoid excess dietary salt. Drink extra fluids to prevent dehydration.

Overexertion during the first few days should be avoided. Adequate physical fitness preparation is recommended.

Need more information on health and wellness?

Click here for information on diet, nutrition and health resource books. Learn when to see the doctor and what causes symptoms.