How difficult is it to climb Mount Everest?

The risks involved in climbing Everest are great. Even when using bottled oxygen, mountaineers can experience fatigue, nausea, vomiting and other related problems such as hypothermia and frostbite. Climbers normally spend months acclimatizing to get their body ready for the extreme conditions which they will encounter. Many people that have climbed Mount Everest come back with both physical and psychological problems from the climb.