- headaches, breathlessness, fatigue
- nausea or vomiting
- inability to sleep
- swelling of the face, hands and feet
The best way to avoid or lessen the effects of mountain sickness is to increase altitude slowly. Climbers and hikers can take two days to reach 8,000 feet, and then another day for each 1,000 to 2,000 higher feet. This may not be an option for people who travel to a destination at high altitude. Most people can adjust or "acclimatize" to the high altitude within a few days. Here are some tips:
- Avoid strenuous activity for the first day or two.
- Drink extra fluid. Be careful of drinking alcohol.
- Its effect is magnified at high altitude.
- Your doctor may prescribe medication to help prevent or treat altitude sickness.