Gingivitis is a term used to describe inflammation of the gums. The main cause is plaque sitting on your teeth/gums for an extended period of time. Gingivitis is reversible. Proper oral hygiene and brushing habits can keep gingivitis from occurring. Do remember to brush your tongue! Signs of gingivitis include red gums at the margins with rolled out borders. Bad breath is also seen with gum disease although more often with periodontitis (gingivitis with bone loss).
Visit your dentist every six months for scale.
Hope this helps.