How does lower cabin humidity during flight typically affect passengers?

Lower cabin humidity during flight can significantly impact the comfort and well-being of passengers. When the humidity levels are lower than what people are accustomed to, it can lead to various physical symptoms. Passengers commonly experience dry skin and dry eyes due to the lack of moisture in the air, which can be quite uncomfortable. Additionally, the body loses water more rapidly in dry environments, leading to increased dehydration. The effects of dehydration can include symptoms like thirst, fatigue, and headaches, which are often exacerbated in the confined space of an aircraft cabin.

While other factors such as fatigue and discomfort may be present during a flight, the direct and most immediate impact of lower humidity relates to these physical symptoms. Therefore, the answer focusing on the effects of dry skin, eyes, and increased dehydration accurately describes the typical experiences of passengers when flying in lower cabin humidity conditions.