Travel Health Preparations Make sure you are healthy before you start traveling. If you are going to have a long trip, please make sure your teeth are OK. If you wear glasses, take a spare pair and your prescription with you. If you require a particular medication, you had better take an adequate supply, as it may not be available locally. It will be greatly helpful to have a legible prescription or letter from your doctor in case of any problems.
Medical Problems & Treatment Self-diagnosis and treatment can be risky, so you should always seek medical help. In Tibet the top and end hotels can usually recommend a good place to go for advice. For some ailments the best advice is to go straightly to local hospital and extreme cases get on a plane to ChengDu.
Altitude Sickness Lack of oxygen at high altitudes (over 2500 m) affects most people to some extent. The effect may be mild or severe and occurs because less oxygen reaches the muscles and the brain at high altitude, requiring the heart and lungs to compensate by working harder. Acute mountain sickness (AMS) is common at high altitudes, and depends on the elevation, the rates of ascent and individual susceptibility. The major risk factor in AMS is the speed with which you make your ascent. Any traveller who flies into Lhasa, for example, which is at just over 3600m, is likely to experience some symptoms of AMS. You should take care to acclimatize slowly and take things easy for the first couple of days.AMS has been fatal at 3000m,although 3500m to 4500m is the usual range.
B>Symptoms In several hours to several days. Symptoms tend to be worse at night and include headache, dizziness, lethargy, loss of appetite, nausea, breathlessness and irritability. Difficulty in sleeping is another common symptom, and many travellers have trouble in sleeping for the first few days after arriving in Lhasa. AMS may become more serious without warning and can be fatal. Symptoms are caused by the accumulation of fluid in the lungs and brain, and include breathlessness at rest, a dry irritative cough (which may progress to the production of pink, frothy sputum), severe headache. These signs should be taken very seriously.
Prevention To prevent acute mountain sickness:
Drink extra water.
Eat light, high-carbohydrate meals for more energy.
Avoid alcohol as it may increase the risk of dehydration and do not smoke.
Do not push yourself , take plenty of breaks.