Mountain sickness
Find out what to do if you have symptoms of altitude sickness, who's affected, and how you can prevent it.
Find out about the symptoms of mild and severe altitude sickness, which include headache, dizziness, nausea and vomiting, shortness of breath, and an increased heart rate.
Find out how altitude sickness should be treated, including descending to a lower altitude, oxygen treatment, and different types of medication.
Altitude sickness can cause potentially life-threatening conditions that affect the brain or lungs. Find out what to do if someone has severe symptoms of altitude sickness.
Find out how to prevent altitude sickness, including climbing slowly, particularly at altitudes of 2,500m or above. Ascending gradually will give your body time to adapt.
Jessica Mathur, a GP from London, was surprised when she became ill with altitude sickness during a holiday in Peru.
After years of mountain climbing, David Hillebrandt learnthow to deal with his altitude sickness.