⚠️ Altitude sickness starts above 2,500m. Mild: headache, nausea, tiredness → rest & hydrate. Danger: severe headache, vomiting, confusion → descend immediately. Go slow, drink water, avoid alcohol, acclimatize. Stay safe in the mountains 🏔️ https://mardihimaltrek.net/how-to-prevent-altitude-sickness-mardi-himal-trek/