Microbe Madness: How Many Are Living in Your Mouth?

March 3, 2026

digital image of bacteria in the mouth

Dentists think about what exists inside the mouth all the time. Their education and hands-on experience lead them to consider the pros and cons of all the bacteria that live in the mouth, but have you ever wondered how many of these microbes live among your teeth and gums? Keep reading to learn the truth and how you can ensure only the best stay behind.

The Basics of Bacteria 101: How Many Are There?

Scientists believe there are billions of bacteria living inside a person’s mouth, and it all starts at birth. Your mother’s oral health can significantly impact your own. For example, if she suffered from severe tooth decay, gum disease, or smoked while pregnant, you will likely have more bacteria in your mouth that can cause you to develop cavities or other similar issues later on.

What Can Impact Your Oral Microbiome?

Several factors can impact how many bacteria live inside your mouth. When healthy bacteria are present, your risk of cavities and gum inflammation decreases. This is why your dentist encourages you to adopt a healthy diet full of nutrient-rich foods (i.e., leafy greens, raw vegetables and fruit, dairy products, lean proteins, etc.).

In addition to your diet, the attention you give to brushing, flossing, and rinsing is paramount. When you commit to cleaning your teeth and gums correctly, you remove bad bacteria from the surfaces of your teeth, around your gums, and throughout your mouth.

Can Bad Bacterial Accumulation Affect Your Body?

Yes, research indicates that when too much bad bacteria accumulate, it can enter the bloodstream. This is especially true with gum disease, as inflammation can damage the blood vessels within your gums. As a result, the infection enters the body.

If you are in good overall health, your internal systems may be able to combat some of these bacteria; however, it’s common for the following health conditions to develop:

  • Diabetes
  • Heart disease
  • Alzheimer’s or dementia
  • Depression
  • Pre-term birth

Ways to Protect & Encourage Healthy Bacteria

If you want to boost the number of good bacteria in your mouth, there are a few simple ways you can do this:

  • Eat foods that contain probiotics, such as yogurt, as well as those rich in fiber (i.e., fruits, vegetables, whole grains, etc.)
  • Avoid refined sugars and processed carbohydrates
  • Practice good oral hygiene habits, like brushing for two minutes twice daily, flossing daily, and rinsing with an ADA-approved mouthwash
  • Quit smoking
  • Reduce the stress in your life (i.e., read a book, take a bath, talk to a counselor, etc.)

Your mouth is a powerful part of your body. Making sure it remains healthy and balanced will ensure better oral and overall health in the future.

About the Practice
Westgate Dental Care’s multiple dentists work together to create an office that prioritizes patient comfort from beginning to end. We also devote time to educating individuals about the benefits of maintaining good oral health and hygiene. If you are interested in meeting one of our team members for a dental checkup and cleaning, visit our website or call us at (847) 908-3684.