Can flying cause brain swelling?

The air pressure on board is therefore almost 19% lower. Accordingly, the cerebral oedema will expand, not in the same proportion, since the human body is itself a kind of pressure suit, but a few millimetres is enough to increase the pressure in the brain to the extent that it becomes life-threatening.



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During decrease in ambient external pressure (as in an aircraft cabin during ascent in flight) and given unchanged temperature, intracranial gas volume will increase. As intracranial gas volume increases, this will also lead to an increase in ICP, as long as the dura mater and/or calvarium is intact.

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recent operation or injury where trapped air or gas may be present in the body (e.g. stomach ,bowel, eyes, face, brain) severe long term diseases that affect your breathing. breathlessness at rest. unresolved pneumothorax (punctured lung)

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The cramped conditions and long periods of being less active on a flight can cause pain, stiffness or swelling of your legs. Being less active can lead to slow blood flow in your veins which increases your risk of developing a blood clot, known as deep vein thrombosis (DVT). DVTs most commonly form in the legs.

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It is well known that imbalance between atmospheric pressure changes and pressure inside the sinuses can cause tissue damage [43–45]. This means, for example, that the pressure in the sinuses is lower than the cabin pressure during the landing [6, 26]. At take-off, the cabin pressure is lower than the sinuses [6, 26].

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The rate of change in oxygen levels can affect physiological response. There is individual variation in physiological response to increasing altitude and in how people feel with reduced oxygen levels. Symptoms of altitude sickness include headache, nausea, vomiting, dizziness, fatigue and insomnia.

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