Altitude sickness has been a major setback in most high-altitude treks in Nepal. Although there are no major risks involved, here are few tips tried and tested by our professional trek leaders and travel planners to avoid high altitude sickness during the trek: Slow ascend with proper rest and enough acclimatization Drink plenty of water and stay hydrated at all times  Eat sufficiently a healthy balanced diet during the entire trek and sleep well  Avoid alcoholic beverages, cigarettes, and tobacco products on the trek Be head-strong and mentally prepared Train your body to cope with uphill hikes with enough cardiovascular or gym workouts, at least 3 months prior to the trek