5 doctors weighed in:

What are the most common symptoms of altitude illness?

5 doctors weighed in
Dr. Kenneth Cheng
Family Medicine
2 doctors agree

In brief: Many

Symptoms of altitude sickness include headache, nausea, dizziness or unsteadiness, confusion, mental status changes, shortness of breath and coughing.
When at altitude, descend immediately at least 1000 feet; if no improvement, descend another 1000 feet. Symptoms of hape and hace (high altitude pulmonary edema and high altitude cerebral edema) require immediate air evacuation.

In brief: Many

Symptoms of altitude sickness include headache, nausea, dizziness or unsteadiness, confusion, mental status changes, shortness of breath and coughing.
When at altitude, descend immediately at least 1000 feet; if no improvement, descend another 1000 feet. Symptoms of hape and hace (high altitude pulmonary edema and high altitude cerebral edema) require immediate air evacuation.
Dr. Kenneth Cheng
Dr. Kenneth Cheng
Thank
Dr. Marybeth Lambe
Travel Medicine
1 doctor agrees

In brief: Most common

The earliest--if you are paying attention (and many, sadly, do not)--headache, loss of appetite, nausea, dizziness and insomnia.
These can occur as low as 6500 feet, especially if you are active. Slowing down, letting yourself acclimate, or sleeping at a lower altitude are best. Taking Diamox (acetazolamide) speeds your body's acclimatization. If symptoms advance-to those described above--get down further fast!

In brief: Most common

The earliest--if you are paying attention (and many, sadly, do not)--headache, loss of appetite, nausea, dizziness and insomnia.
These can occur as low as 6500 feet, especially if you are active. Slowing down, letting yourself acclimate, or sleeping at a lower altitude are best. Taking Diamox (acetazolamide) speeds your body's acclimatization. If symptoms advance-to those described above--get down further fast!
Dr. Marybeth Lambe
Dr. Marybeth Lambe
Thank