Inflammation is extraordinarily common. It underlies hundreds of diseases, from asthma to arthritis (in fact, any disease that ends in "-itis"). It often occurs

Inflammation is extraordinarily common. It underlies hundreds of diseases, from asthma to arthritis (in fact, any disease that ends in "-itis"). It often occurs inside the body (not just on the skin), so you could have inflammation right now and not know it. http://en.wikipedia.org/wiki/Inflammation#Inflammatory_disorders http://en.wikipedia.org/wiki/Inflammation#Inflammatory_disor...