Altitude sickness occurs when you cannot get enough oxygen from the air at high altitudes. This causes symptoms such as a headache, loss of appetite,feel weak and tired and trouble sleeping. It happens most often when people who are not used to high altitudes go quickly from lower altitudes to 8000 ft (3438 m) or higher. For example, you may get a headache when you drive over a high mountain pass, hike to a high altitude, or arrive at a mountain resort. Altitude sickness can be dangerous. It is smart to take special care if you go high-altitude hiking or camping .
Prevention for altitude sickness
You may be able to prevent altitude sickness by taking your time when you go to high altitudes, using medicine in advance, and eating certain foods.
Avoid large meals, alcohol, and being very active after you arrive just rest, and drink plenty of liquids.
If you have symptoms, do not go higher until they have gone away.
Eat a lot of carbohydrates. This includes breads, cereals, grains, and pasta
“Climb high, sleep low” is standard practice for those who spend time at high altitudes.
Consume a high-carbohydrate diet