The single biggest risk on any high-altitude trek — and the simple habits that prevent it.
Acute Mountain Sickness can affect anyone above 2,500m, regardless of fitness level. The single most effective prevention is a slow, staged ascent — never gain more than 300-500m of sleeping altitude per day above 3,000m.
Drink at least 3-4 litres of water daily, avoid alcohol, and take at least one full acclimatisation day for every 1,000m gained. Know the warning signs — persistent headache, nausea, and loss of appetite — and descend immediately if symptoms worsen.
Many trekkers also carry Diamox as a preventative measure; talk to a travel doctor before your trip to see if it's right for you.
