A lot of people might go on a flight and feel a little unusual in some sort of way, and that’s completely normal. The environment of the plane is completely different than that of the regular world, so before you get on your next flight, learn about how the plane can affect you and your body.
The cabin oxygen pressure is mostly set to a lower amount than most people are used to, and this can cause your oxygen levels to drop as well. This can lead to you feeling light-headed or sleepy, which is why you probably fall asleep on planes pretty easily.
The air that circulates within the cabin is drawn from outside the plane, which is very low in moisture. This dry air can actually cause you to become dehydrated, so you have to make sure that before the flight and during you’re drinking a lot of water. The dry air can also dry out your skin quite easily, so bringing lotion is a good idea.
The fact that seats are getting tighter and more cramped leads to terrible circulation while you’re on a flight. This can especially affect your ankles and legs making them swollen or numb.