Latest USC Dornsife News in the Topic Pain http://dornsife.usc.edu/news/topics/23775/pain/ You may not think of the fizz in soda as spicy, but your body does. The carbon dioxide in fizzy drinks triggers the same pain sensors in the nasal cavity as mustard and horseradish, though at a lower intensity, according to new...]]> Wed, 29 Sep 2010 09:48:00 -0500