High-altitude travel can affect anyone, including fit and experienced travellers, because the body needs time to adjust to lower oxygen levels. In Arunachal Pradesh, this is particularly relevant when visiting Tawang, Sela Pass, Bum La and other high mountain areas.
Travellers who ascend quickly may experience headache, dizziness, nausea, unusual tiredness, poor sleep or shortness of breath. Physical fitness does not guarantee protection from altitude sickness, so symptoms should not be ignored simply because a traveller is otherwise healthy.
People with existing heart, lung or other medical conditions that could be affected by altitude should seek medical advice before planning a high-altitude itinerary. Older travellers, families with children and anyone uncertain about their ability to manage altitude may also benefit from a slower schedule and fewer demanding excursions.
A gradual journey, adequate rest, hydration and avoiding strenuous activity soon after reaching higher elevations can make acclimatization easier. Do not continue climbing if altitude symptoms are becoming worse.
Severe or worsening symptoms require prompt attention, and descending to a lower elevation may be necessary. Travellers concerned about altitude can also build an Arunachal Pradesh winter itinerary around lower areas rather than making the highest mountain passes the focus of the trip.