<Tr> <Td_colspan="2"> (edit on Wikidata) </Td> </Tr> <P> Altitude sickness, also known as acute mountain sickness (AMS), is negative health effect of high altitude, caused by acute exposure to low amounts of oxygen at high altitude . </P> <P> Although minor symptoms such as breathlessness may occur at altitudes of 1,500 metres (5,000 ft), AMS commonly occurs above 2,400 metres (8,000 ft). It presents as a collection of nonspecific symptoms, acquired at high altitude or in low air pressure, resembling a case of "flu, carbon monoxide poisoning, or a hangover". It is hard to determine who will be affected by altitude sickness, as there are no specific factors that correlate with a susceptibility to altitude sickness . However, most people can ascend to 2,400 metres (8,000 ft) without difficulty . </P> <P> Acute mountain sickness can progress to high altitude pulmonary edema (HAPE) or high altitude cerebral edema (HACE), both of which are potentially fatal, and can only be cured by immediate descent to lower altitude or oxygen administration . </P>

When do you start to get altitude sickness