Tibet Travel Tips

Altitude sickness, or Acute Mountain Sickness (AMS), occurs when your body cannot adjust to the lower oxygen levels at high elevations, typically starting above 2,500 meters (8,000 feet). While often mild, it can progress to life-threatening conditions if symptoms are ignored. 

Types and Symptoms

Altitude sickness is categorized into three main syndromes. Recognizing the differences is critical for safety. 

• Acute Mountain Sickness (AMS): The mildest and most common form. It feels similar to a bad hangover.
• Common Symptoms: Throbbing headache, nausea, dizziness, fatigue, and trouble sleeping.
• High Altitude Pulmonary Edema (HAPE): A dangerous buildup of fluid in the lungs.
• Warning Signs: Extreme shortness of breath even at rest, a persistent cough (sometimes with pink/frothy spit), and blue-tinted lips or fingernails.
• High Altitude Cerebral Edema (HACE): A severe medical emergency where the brain swells with fluid.
• Warning Signs: Confusion, irrational behavior, and a loss of coordination—often described as acting "drunk" or being unable to walk in a straight line (ataxia). 

Prevention Strategies

The most effective way to prevent altitude sickness is gradual acclimatization. 

• Ascend Slowly: Above 3,000 meters, aim to increase your sleeping elevation by no more than 300–500 meters (1,000–1,600 feet) per day.
• Rest Days: Schedule a rest day for every 1,000 meters (3,300 feet) of gain.
• Climb High, Sleep Low: Trekking to a higher point during the day and returning to a lower altitude to sleep helps stimulate oxygen adaptation.

Lifestyle Adjustments:

• Hydration: Drink 3–5 liters of water daily to combat dry air and altitude-induced fluid loss.
• Diet: Consume a high-carbohydrate diet (over 70% of calories) as it requires less oxygen to metabolize.
• Avoid Depressants: Do not consume alcohol, smoke, or take sleeping pills, as they can suppress your breathing rate during sleep. 

Treatment and Medications

If you develop symptoms, the standard rule is: "Don't go up until symptoms go down". 

• For Mild Symptoms: Stop ascending immediately and rest at your current altitude for 24–48 hours. Over-the-counter pain relievers like ibuprofen or paracetamol can treat headaches.
• For Severe Symptoms: Immediate descent of at least 500–1,000 meters is the only definitive treatment.

Prescription Medications:

• Acetazolamide (Diamox): Speeds up acclimatization. It is best used as a preventative before ascent.
• Dexamethasone: A steroid used to treat brain swelling (HACE) in emergencies.
• Nifedipine: Helps reduce lung pressure in cases of HAPE. 

Golden Rules for Travelers 

• Know the early symptoms and be honest with yourself and your partners about how you feel.
• Never ascend to sleep higher if you have any symptoms of altitude illness.
• Descend immediately if symptoms worsen while resting at the same altitude or if signs of HAPE/HACE appear.