Skip to content
periodontist.best Find a periodontist

Gingivitis Gum disease

Gingivitis is inflammation of the gums caused by plaque at the gumline. Gums turn red, swell and bleed when brushed. It is the first stage of gum disease and the only one that fully reverses: in the classic 1965 Löe study, gums returned to health within about a week of restarting cleaning.

Bright smile with healthy teeth and glossy lips, photo for Gingivitis

Signs

  • Bleeding when brushing or flossing
  • Red or dusky gums
  • Puffy gum edges
  • Bad breath
  • Tender gums

Risk factors

  • Skipped flossing
  • Smoking
  • Pregnancy and hormonal change
  • Diabetes
  • Crowded teeth and old dental work that traps plaque

What causes gingivitis?

Plaque left at the gumline for a few days causes gingivitis. In 1965 Harald Löe asked healthy dental students to stop all cleaning. Every one developed gingivitis within 10 to 21 days, and every one healed within days of starting again. The study proved that plaque, and nothing else, starts gum disease.

How is gingivitis treated?

  • A professional cleaning removes plaque and tartar above and just below the gumline.
  • Brushing twice a day with a soft or powered brush, angled toward the gumline.
  • Cleaning between the teeth every day with floss, picks or a water flosser.
  • An antimicrobial rinse for a short period when a dentist advises it.

Bleeding usually settles within one to two weeks of steady care.

When does gingivitis become periodontitis?

Gingivitis becomes periodontitis when the inflammation detaches the gum from the root and the bone starts to resorb. A dental probe then reads pockets of 4 mm or more, and X-rays show bone loss. Not everyone with gingivitis progresses. Smoking, diabetes and genetics decide much of the risk.

Questions

Is it normal for gums to bleed when flossing?

No. Healthy gums do not bleed. Bleeding that lasts more than a week or two of daily flossing is a sign of gingivitis or deeper disease.

Can gingivitis go away on its own?

Only with better cleaning. The plaque that causes it has to be removed every day; without that, inflammation stays and can progress.

Is gingivitis common in pregnancy?

Yes. Hormonal change makes gums react more strongly to plaque. Pregnancy gingivitis is treated with cleaning and settles after delivery.

Sources

  1. Löe H, Theilade E, Jensen SB. Experimental gingivitis in man. J Periodontol 1965
  2. American Academy of Periodontology, patient resources
  3. National Institute of Dental and Craniofacial Research, periodontal (gum) disease

Gum disease Read next