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Rating Newest Oldest. Best Answer: The can gets cold for the same reason that any other refrigeration unit gets cold. (eg air conditioner, refrigerator, dehumidifier). Inside of the can, there is a chemical which can be used as a refrigerant. It's a chemical with a low vapor pressure. When you press the button on top of the can, you open a valve and release some of the pressure from the can.
While it is a myth that cold air causes colds and flu, there are some indirect ways that cold air can make you more likely to contract a fever and the muscle pains that go with it. Cold air can cause your mucas to thicken in your nose and cause the skin in your nose to dry.ow Cold Air Affects the Muscles and Joints. The colder months generally bring with them lower barometric air pressure. Gas expands when heated and contracts when cooled so the lower air temperature causes the air to constrict and result in lower pressure.