Painful inflammation that takes months or up to a year to heal—this can be seen in the mouth after using white snus.

an association that was verified by using a standard index used by dentists to measure the severity of gum inflammation. "While the main findings were consistent with their expectations ...

It tends to build up on the surface of teeth, and can creep below the gum line fostering inflammation. Credit: Steve Gschmeissner/Science Photo Library/Getty Images Around the fourth century BCE ...