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Best Answer: The vertical groove between your upper lip and nose is known as the 'philtrum'. It allows for a greater range of lip motions than would otherwise be possible. http://en.wikipedia.org/wiki/Philtrum.
Sinuses, which are paired air spaces connected to your nose, is lined with very delicate skin called the mucus membrane. The mucus membrane may then become inflamed by many things like bacteria, colds and fluâs, allergies or even a fungus invasion.