Recognising Altitude Sickness Symptoms Fast

Altitude sickness affects trekkers at any fitness level. The Lake Louise Score system makes assessment simple — every trekker should memorise it before heading above 3,000m.

Overview

Acute Mountain Sickness (AMS) typically develops 6-12 hours after arriving at a new altitude. Mild AMS: headache plus one of (fatigue, dizziness, nausea, poor sleep). Severe AMS: the same symptoms becoming debilitating. High Altitude Pulmonary Edema (HAPE) and High Altitude Cerebral Edema (HACE) are life-threatening and require immediate descent of at least 500m regardless of time of day or weather. The golden rule is simple: never ascend with AMS symptoms. Many trekkers heading to Everest Base Camp use Sajilo to arrive at Kathmandu airport relaxed and rested before their mountain flight — starting the trek without fatigue reduces early AMS risk.

FAQ

Does Diamox prevent altitude sickness? Diamox (acetazolamide) helps with acclimatisation but is not a substitute for proper ascent profiles. Consult a doctor before taking it.

How quickly should I descend if I have HAPE symptoms? Immediately — HAPE (coughing pink froth, severe breathlessness at rest) kills within hours. Descend and call for helicopter evacuation simultaneously.

Is altitude sickness more likely if I am unfit? No — fitness does not protect against AMS. Slow ascent and good hydration are the only reliable preventive measures.