Altitude sickness

If you plan to travel to high altitudes, beware of altitude sickness. About one-quarter of people who rapidly travel to 8,000 feet experience symptoms including headache, nausea, fatigue, and difficulty sleeping. These problems usually disappear over time, but if they continue or worsen, or if you find yourself short of breath at rest, become confused, or have trouble walking in a straight line, immediately seek medical attention.…