GINGIVITIS is an inflammation of the gum tissue around the teeth.Since gingivitis is usually painless and has very mild symptoms, many people who have it are unaware of it. Is it curable and preventable? Absolutely!Gingivitis can be prevented, and existing gingivitis can be reversed with good oral hygiene and a bit of help from your dentist and dental hygienist.How can you tell if you have gingivitis?