This is a concise but detailed handbook for doctors and laypersons providing practical information on medical problems and their treatment at high altitudes. This book not only discusses the technical changes that take place at altitude but also gives useful information on how the difficulties can be handled. The great mountain ranges of the world, once only visited by a privileged minority, are now accessible to anyone able to afford a package holiday and with the wish to go there. General practitioners and other health care workers therefore find their advice is increasingly sought by patients. This book answers many of these questions.