Your gums and your blood sugar: the link between oral health and diabetes

A lot of people with diabetes don’t know this: the state of your gums could be making it harder to control your blood sugar. I know that sounds like a lot. But after years of working in dentistry, I can tell you that the link is real, it has been studied considerably,, and it is almost always ignored. When it comes to managing diabetes, we spend a lot of time talking about diet, exercise, and medications. There isn’t much talk about dentistry. That has to change.

What is gum disease, exactly?

Periodontal disease, also known as gum disease, is a long-lasting bacterial infection of the tissue around your teeth. It starts with gingivitis, which is when your gums look a little red, feel puffy, and bleed when you brush. If you don’t treat it, it will slowly get worse and turn into periodontitis, which is when the infection goes below the gumline and starts to destroy the bone that holds your teeth in place. This is the part that shocks people: it usually doesn’t hurt. Not until it gets really bad. More than half of adults over 35 have signs of gum disease that can be measured, but most of them don’t know it. That quietness is part of what makes it so dangerous.

What does this have to do with blood sugar?

Everything, as it turns out. . The relationship goes both ways, which is why it is so important to understand. When you have diabetes, your body has a harder time fighting off infections and healing. High blood sugar feeds the bad bacteria in your mouth, and less blood flow to your gums makes it even easier for an infection to get started. Your gums are a great place for disease to grow. But this is where things get really interesting. When you chew or brush your teeth, bacteria get into your bloodstream through that gum infection. Your immune system releases chemicals that cause inflammation. Those same chemicals mess with how your body uses insulin. What happens then? You are left with blood sugar that is harder to control and a higher chance of problems including nerve damage, kidney disease, and heart issues. One condition causes the other, and the cycle keeps going.

What do studies say?

Research has consistently demonstrated that individuals with gum disease experience greater difficulty in maintaining stable blood sugar levels, and that treatment is beneficial. Several studies have shown that patients who had their gum disease treated saw a drop in their blood sugar levels over time. This may not happen overnight, but it is a change that will last. Think of it this way: getting rid of an infection your body has been quietly fighting for months gives it more room to work better. Researchers now see untreated gum disease as a real risk factor for bad diabetes management, along with diet and lifestyle. That means a lot.

Why doesn’t anyone talk about this?

Because dentists and doctors usually don’t work together. At a clinic, a patient is told they have diabetes and given a prescription. No one talks about going to the dentist. A person with gum disease goes home with mouthwash, but no one asks about their blood sugar. The two fields don’t often connect the dots, and patients suffer as a result. Both of these conditions also like to hide. For years, diabetes can go undiagnosed. Gum disease doesn’t hurt until it’s already done a lot of damage. So a lot of people are getting worse and worse without anyone doing anything about it.

What can you do now?

The good news is that the steps are easy. Not just when something hurts, but every six months, go to the dentist and ask for a periodontal check. Brush your teeth twice a day and floss once a day. Pay special attention to the gumline, where bacteria like to hide. Tell your dentist if you have diabetes and give them your blood sugar numbers.. If you’ve been told you have gum disease, tell your doctor and ask if your blood sugar has been tested recently. If you smoke, quitting is one of the best things you can do for both conditions at the same time.

The mouth is the doorway to health

Sometimes we think of the mouth as being separate from the rest of the body. It isn’t. It has the same blood flow, immune system, and inflammatory pathways. When the gums are sick, the whole body knows it. People with diabetes may not realize it, but one of the best things they can do for their metabolic health is get their oral health checked and treated.

The science is clear. Now. it just needs to be talked about.

(Dr. Sowjanya Gunukula is a U.S.-licensed dentist with international training who focuses on preventive and evidence-based oral healthcare and contributes to advancing community and public health dentistry. sowji.gunukula@gmail.com)