Editing Altitude sickness (section)

=== Primary symptoms ===
[[Headache]]s are the primary symptom used to diagnose altitude sickness, although a headache is also a symptom of [[dehydration]].{{citation needed|date=September 2022}} A headache occurring at an altitude above {{convert|2400|m}}{{snd}}a pressure of {{convert|76|kPa|atm}}{{snd}}combined with any one or more of the following symptoms, may indicate altitude sickness:
{|
|- style="vertical-align:bottom;text-align:left;"
! Disordered system
! Symptoms
|- style="vertical-align:top;"
| Gastrointestinal
| Loss of appetite, [[nausea]], vomiting, [[high-altitude flatus expulsion|excessive flatulation]]<ref name="Auerbach 2007" />
|- style="vertical-align:top;"
| Nervous
| [[Fatigue]] or weakness, headache with or without [[dizziness]] or [[lightheadedness]], [[insomnia]], [[Paraesthesia|"pins and needles" sensation]]
|- style="vertical-align:top;"
| Locomotory
| [[Peripheral edema]] (swelling of hands, feet, and face)
|- style="vertical-align:top;"
| Respiratory
| Nose bleeding, shortness of breath upon exertion
|- style="vertical-align:top;"
| Cardiovascular
| Persistent rapid pulse
|- style="vertical-align:top;"
| Other
| General [[malaise]]
|}