How long can the effects from altitude exposure last after descent?

Altitude exposure can lead to various physiological effects due to the decrease in atmospheric pressure and the resultant drop in oxygen availability. When individuals return to lower altitudes, some effects can linger for a considerable period. The duration of these effects, particularly those associated with acute mountain sickness (AMS) or high-altitude pulmonary edema (HAPE), can last from several hours to days after descent.

In cases of AMS, for instance, symptoms such as headache, nausea, and sleep disturbances may persist for a while even after returning to lower elevations. Thus, it is important to note that acclimatization and recovery from altitude can be variable among individuals, depending on factors such as the altitude attained, duration of exposure, and individual susceptibility. Hence, understanding that the residual effects from altitude exposure can indeed last from several hours to days is essential for ensuring safety and managing health in aviation contexts.