Nathula Pass is a high-altitude destination, so visitors need to consider both lower oxygen levels and severe winter conditions. Even healthy travellers can experience headache, dizziness, nausea, unusual tiredness or shortness of breath after reaching higher elevations.
Keep physical activity light during the visit, stay adequately hydrated and avoid rushing around immediately after arriving. If altitude-related symptoms become worse, do not continue towards a higher point simply to complete the itinerary. Severe breathlessness at rest, confusion or loss of coordination requires urgent attention and descent when safely possible.
Cold and wind add another challenge during winter. Wear thermal layers, an insulated jacket, gloves, warm socks and footwear with good grip. Avoid prolonged exposure to severe cold and take extra care on snowy, slushy or icy walking surfaces.
Travellers with heart or lung conditions, and anyone concerned about how high altitude may affect them, should seek medical advice before planning the excursion. Medication for altitude illness should be taken only with appropriate medical guidance.
Follow instructions from local authorities and your driver, particularly when snowfall or ice affects the road. Nathula should be treated as an optional, conditions-dependent excursion, and turning back or cancelling the visit is the safer choice when weather, road access or personal health makes continuing unsuitable.