Many retirees would love to retire somewhere warmer with a beautiful coast and a reasonable cost of living. Puerto Vallarta, Mexico, is one of the options many retirees may want to consider. There are several challenges to consider such as the difficulties with Medicare in foreign countries and the different income tax situations.
The air pressure inside a human body is roughly equivalent to the pressure of the atmosphere. Normal air pressure is about 13.7 pounds per square inch at sea level.
All forms of physical pressure are detectable by humans using the sense of touch. In other words, yes, humans can detect pressure. If you've ever been in a barometric chamber you can easily attest to the truth of this fact. Gradual changes in atmospheric pressure are typically undetectable.