For frequent flyers out there, you might wanna listen up.
Studies suggest that frequent flyers like pilots have more than double the risk of developing melanoma compared to the general population. Plane windows did not sufficiently block harmful UV rays, which are more powerful at higher altitudes.
About a third of your taste buds go numb during flight. The dry air evaporates nasal mucus, and membranes become swollen from cabin pressurization, making it more difficult to detect food scents needed for taste. At cruising altitudes, your blood absorbs less oxygen, which can cause sleepiness, dizziness, fatigue, and a lack of mental sharpness. The decreased air pressure in the plane also causes gas to expand in your body, which can lead to discomfort.
Sitting for a very long time decreases blood flowing, causes blood to pool in your lower extremities. This causes your muscles to stiffen and increases the risk of blood clots. Pick your legs up and walk around a bit.
There's a risk of altitude-induced decompression sickness in flight. One symptom is joint pain, or the bends. If you've gone scuba diving, your risk is increased, and you should wait at least 24 hours after a dive to take a flight.
飛行時海拔高度引起的減壓病有危險性。一個症狀是關節痛，或稱潛水夫病。如果你去水肺潛水過，你的風險就增高了，而你在潛水後應該等至少 24 小時再去搭飛機。
Crossing two or more time zones can give you jet lag, as it takes your brain longer to catch on to the new pattern of day and night. The effects are less prominent when flying east to west, because you're getting daylight.
You're exposed to cosmic radiation at higher altitudes. Some studies suggest that frequent flyers like pilots or flight attendants have a higher risk of getting cancer due to radiation. But don't worry, you'll probably more likely to get into a plane crash than cancer from that radiation.