Acute Mountain Sickness (AMS) is common at high altitudes and depends on the elevation, the rate of ascent and individual susceptibility. Most visitors to Tibet will suffer from at least some symptoms which will generally disappear through acclimatization after several hours or a few days.
Symptoms tend to be worse at night and include headaches, dizziness, lethargy, loss of appetite, nausea, breathlessness and irritability. Difficulty in sleeping is also a common symptom and many travelers have trouble with this for the first few days on arriving in Lhasa.
To prevent acute mountain sickness:
l Drink extra fluids. The mountain air is dry and cold and moisture is lost as you breathe. Evaporation of sweat may occur unnoticed and result in dehydration.
l Eat light, high-carbohydrate meals for more energy.
l Avoid alcohol as it may increase the risk of dehydration and don't smoke.
l Avoid sedatives.
l Don't push yourself when walking or climbing and take plenty of breaks.
l Try to avoid catching a cold before entering Tibet.
Who shouldn't go?
The Tibet Travel Expert may suggest those who suffer from high blood pressure or heart disease not travel to Tibet.
(Tibet Travel Expert)