Is it common to get sick after flying?

The Dry Air of Flight: A Common Cause of Post-Flight Ailments

The crisp, clean air of an airplane cabin, while seemingly refreshing, often harbors a hidden health threat. Airplane cabins, designed for efficient air circulation and pressure regulation, maintain extremely low humidity levels, frequently dipping below 20%. This stark contrast with the 30-60% humidity typically found in homes and other environments can significantly impact travelers’ health. While the experience might not be immediately noticeable, various ailments are commonly experienced after a flight.

The dehumidified air in the cabin has a profound effect on the human body, directly influencing respiratory systems and skin health. Reduced humidity can lead to dry nasal passages, making individuals more susceptible to nasal congestion, coughs, and even headaches. The dehydration of the mucous membranes can also lead to irritation and discomfort. This effect is amplified by the enclosed and recirculated air environment.

Beyond the respiratory system, the low humidity contributes to skin dryness and irritation. Many people report dry, flaky skin, often accompanied by itching, following a long flight. This is due to the rapid evaporation of moisture from the skin’s surface in the low-humidity environment. Furthermore, the constant pressure changes, while a less direct contributor, can exacerbate existing dryness and discomfort.

While some individuals might be more sensitive to the effects of dry air, almost everyone experiences some degree of dehydration during a flight. This can lead to an increased susceptibility to a range of minor ailments. This isn’t just about feeling slightly uncomfortable; frequent travelers, especially those prone to respiratory issues, might find they suffer more frequently after extended air travel.

The impact of the dry cabin air is further amplified by the confined space and potentially stressful conditions of a long flight. The stress itself can weaken the immune system, making travelers more vulnerable to infections. The decreased humidity therefore contributes to a perfect storm that makes one more likely to experience ailments post-flight.

Fortunately, preventative measures exist. Prior to travel, staying adequately hydrated is crucial. Carrying a humidifier (if permitted) or using a humidifier in your hotel room can mitigate the effects of dry air on skin and nasal passages. After a flight, moisturizing lotions can help replenish moisture lost during the trip. Frequent use of saline nasal sprays can also help keep nasal passages moist.

The dry air of airplane cabins is a real, and often overlooked, factor influencing post-flight health. Understanding its impact allows travelers to take proactive steps to mitigate these potential problems and enjoy a smoother transition back to their usual environment.