Altitude Sickness: Prevention and Treatment
Understanding the Thin Air
Acute Mountain Sickness (AMS) is the primary concern for anyone trekking above 2,500 meters. In the Himalayas, where trails often cross 5,000 meters, understanding AMS is not just helpful—it is vital for survival. AMS occurs because the body hasn't had enough time to adapt to the lower oxygen levels at high altitudes.
Early Warning Signs
It starts subtly. You might feel a dull headache, a loss of appetite, or difficulty sleeping. Many trekkers dismiss these as fatigue, but that is a dangerous mistake. If a headache persists after taking aspirin and drinking water, you must assume it is altitude-related.
- Mild Symptoms: Dizziness, fatigue, shortness of breath upon exertion.
- Severe Symptoms (HAPE/HACE): Extreme breathlessness even at rest, confusion, loss of coordination (ataxia), and a persistent cough producing frothy spit. These are medical emergencies.
The Golden Rules of Prevention
The best treatment for altitude sickness is prevention. The "Golden Rule" is to never ascend more than 300-500 meters of sleeping altitude per day once you pass 3,000 meters. Follow the "climb high, sleep low" philosophy: hike to a higher point during the day but return to a lower elevation to sleep. Avoid alcohol and tobacco, as they dehydrate the body and mask symptoms. Many guides recommend Diamox (Acetazolamide), which helps the body acclimatize faster, but you should consult a doctor before using it. Most importantly, if symptoms worsen, the only cure is descent. Never, ever go higher if you are feeling unwell. The mountain will always be there, but your health is irreplaceable.
