Is Gingivitis Contagious?

June 2, 2025

Person showing gingivitis in their mouth.

Gingivitis is a common and mild form of gum disease that causes inflammation, redness, and swelling of the gums. While gingivitis is often discussed in terms of brushing and flossing habits, one question people frequently ask is: Is gingivitis contagious? The answer is yes and no. Gingivitis itself isn’t contagious in the way a cold or flu might be, but the bacteria that cause it can be transmitted from person to person. Understanding how this works can help you protect both your oral health and that of your loved ones.

What Causes Gingivitis?

Gingivitis is primarily caused by plaque buildup on the teeth due to inadequate brushing and flossing. When plaque isn’t removed regularly, it hardens into tartar, which irritates the gums and can lead to inflammation and bleeding. If left untreated, gingivitis can progress to periodontitis, a more serious form of gum disease that can result in tooth loss.

While poor oral hygiene is the main culprit, certain types of bacteria found in the mouth also play a major role.

How is Gingivitis “Contagious”?

Although gingivitis itself is not directly contagious, the bacteria responsible for it can be spread through saliva. This means that kissing, sharing utensils, drinks, or toothbrushes with someone who has gingivitis could potentially transfer these bacteria to your mouth.

However, simply acquiring these bacteria doesn’t automatically mean you’ll develop gingivitis. Whether or not the bacteria lead to gum disease depends on several factors, including:

  • Your oral hygiene habits.
  • Your immune system.
  • Genetics.
  • Smoking or tobacco use.
  • Diet and overall health.

In other words, exposure to harmful bacteria increases your risk, but it’s not a guarantee you’ll develop gingivitis, especially if you maintain good dental care practices.

Who’s Most at Risk?

Young children, partners, and people living in close quarters with someone who has untreated gum disease may be at greater risk of bacterial transmission. If one family member has gingivitis, it’s wise for others to be especially diligent with their oral care routines and avoid sharing personal items.

How to Prevent Gingivitis (and Protect Others)

The best way to prevent gingivitis is to stick to a solid oral care routine:

  • Brush twice a day with fluoride toothpaste.
  • Floss daily to remove plaque between teeth.
  • Use an antibacterial mouthwash.
  • Visit your dentist regularly for cleanings and checkups.

And to prevent spreading bacteria to others:

  • Avoid sharing toothbrushes, utensils, or drinks.
  • Don’t kiss when someone has visible gum inflammation or bleeding.
  • Encourage household members to practice good oral hygiene.

While gingivitis itself isn’t contagious in the traditional sense, the bacteria that cause it can be shared through saliva. This makes oral hygiene a shared responsibility in close relationships. The good news? With proper care and regular dental visits, gingivitis is preventable and reversible—so keep brushing, flossing, and smiling with confidence.

About the Practice

Have you developed gingivitis? Elwood Avenue Dental has the solution for you. Visit our state-of-the-art, amenity-rich facility for gum disease treatment. We offer laser periodontal therapy for more comfortable care in the dentist’s chair. Anxious about visiting the dentist? No problem – we have sedation methods available to put your worried mind at ease while we get your oral health back in shape. Schedule your appointment online or call us at (918) 299-2298.