Altitude sickness is a common condition that can happen when you climb to a high altitude too quickly.
Our Health A-Z contains more information on High altitude pulmonary oedema.
Severe head injuries require immediate medical attention because there's a risk of serious brain damage.
Our Health A-Z contains more information on Major head injury.
Important: If you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.