Your doctor tells you your blood sugar is running high, and a week later you notice pink in the sink when you brush. It's easy to file those as two separate problems, one for your doctor and one for your dentist. But gum disease and diabetes show up together often enough that you start to wonder whether one is feeding the other, and whether your gums could be making your numbers harder to bring down.

The short answer

Gum disease and diabetes are linked in both directions. High blood sugar makes your gums easier to infect and slower to heal, and the inflammation from infected gums can make blood sugar harder to manage. That's why I never treat bleeding gums as "just gums" in someone with diabetes or prediabetes. The good news runs both ways too: treating gum disease may help lower blood sugar over time, and better blood sugar control helps gums heal. If your gums are red, swollen or bleed when you brush, an exam is the first step.

What the research shows about gum disease and blood sugar

Diabetes is common. The CDC puts it at about 1 in 8 Americans, and the same page says something I wish every patient with diabetes heard from their doctor: gum disease can be more severe and take longer to heal when you have diabetes, and if you have gum disease, your diabetes may be harder to manage.

That second half is the part people miss. Most of us assume the arrow only points one way, from blood sugar to mouth. It doesn't. Infected gums keep the body in a state of low-grade inflammation, and that inflammation works against blood sugar control.

People with diabetes have a higher chance of having gum disease, and when blood sugar is poorly managed, gum disease tends to show up more often and hit harder. Diabetes can also slow healing, which is one reason gum treatment can take longer to settle in someone whose numbers are high.

So when I see a mouth with deep pockets around the teeth and gums that bleed at a light touch, I ask about blood sugar. And when someone tells me they've just been diagnosed with diabetes, I look at their gums more closely than I would otherwise.

Why high blood sugar and inflamed gums feed each other

Here's how I explain it in plain words.

Sugar in your blood means sugar in your saliva. When your blood sugar runs high, your saliva carries more sugar too. The bacteria that live along your gumline feed on it. More food means more bacteria, more plaque, and more irritation where the gum meets the tooth.

Your defenses are slower. High blood sugar can weaken the white blood cells that fight infection. The same bacteria that a healthy body would keep in check get more room to settle in below the gumline, where your toothbrush can't reach.

Bleeding gums are an open door. Once gums are inflamed and bleeding, oral bacteria and the inflammation they cause can get into the bloodstream. That inflammation doesn't stay in your mouth. It's part of the same picture that links gum disease to heart disease and other problems elsewhere in the body, and with diabetes it can help set the stage for blood sugar that's harder to bring down.

It's never just your gums. It's your whole body talking through your mouth.

Signs of gum disease to watch for if you have diabetes

Gum disease is often quiet early on. It rarely hurts until it's advanced. These are the signs you can see or feel on your own:

• Gums that bleed when you brush or floss. Bleeding gums are not normal, even if they've bled for years.
• Red, puffy or tender gums instead of firm, pale pink tissue.
• Gums pulling back so your teeth look longer than they used to.
• Bad breath or a bad taste that comes back soon after brushing.
• Teeth that feel loose or a bite that feels different when you chew.
• A dry mouth that feels sticky or makes it hard to swallow dry food.
• White patches or sore spots that don't go away.

If two or three of those sound familiar, don't wait for your next routine visit. Book an exam and tell us about your diabetes when you do. It changes what I look for.

What I do about it in the office

When someone with diabetes or prediabetes comes in with inflamed gums, I look at three things first.

1. How deep the problem goes. I measure the small spaces between your gums and teeth and look at your X-rays to see whether bone around the teeth has been affected. That tells me whether a regular cleaning is enough or whether the gums need more.

2. What's driving the infection. Two mouths with the same bleeding can have different bacteria behind it. Salivary testing shows which bacteria are present and how protective your saliva is. With diabetes, that matters, because I'm planning for a body that heals more slowly.

3. How your blood sugar is doing right now. I'll ask about your recent readings and your doctor's plan. I don't manage your diabetes, and I won't touch your medications. But healing after gum treatment follows blood sugar control, so I want to know where you stand.

When the gums need treatment, the next step is a deep cleaning with salivary testing, which is $1,802 combined. One fee covers both: the cleaning below the gumline that removes the hardened plaque your toothbrush can't reach, and the saliva test that shows what's driving the problem. Depending on your plan, insurance has helped cover deep cleanings. We file the claim with your insurance for you, so if your plan has out-of-network benefits, you can use them, and HSA and FSA cards work too.

After that, the gums need follow-up. People with diabetes often do best with more frequent preventive wellness visits, because inflammation can build back faster. If you don't have dental insurance, the Smile Wellness Membership includes two, three or four wellness visits a year depending on the plan, plus exams and 10% off other treatment, with some exclusions.

What you can do this week

You don't have to wait for an appointment to start helping your gums. These are small, specific steps:

• Brush twice a day with fluoride toothpaste and a soft brush, angled toward the gumline where plaque collects.
• Clean between your teeth once a day. Floss, small brushes or a water flosser all work. Pick the one you'll actually use.
• Keep water close. If your mouth feels dry, sip water through the day. Some medications reduce saliva too, so mention every medication you take at your next visit.
• Write down your recent blood sugar readings and bring them to your dental exam.
• Tell your doctor about bleeding gums, and tell your dentist about your diabetes. Both of them should know.
• If you smoke, talk to your doctor about quitting. Smoking raises the risk of gum disease and makes diabetes harder to manage.

If you've had gums that bleed when you brush for a while, I've written more about why gums bleed and what fixes it.

Bring your gums into your diabetes plan

I'm Darya Timin, DDS, FAGD, and at Redefine Dental Aesthetic and Wellness Center in Dallas I treat the mouth as part of the body, not a separate department. If you're managing diabetes or prediabetes, healthy gums are one more thing working in your favor instead of against you.

At your exam, I'll check your gums, look at what's driving any inflammation, and give you a clear plan that fits around your blood sugar and your doctor's care. You'll leave knowing exactly where your gums stand and what to do next. Book a consultation or call (214) 295-9270. If cost is on your mind, you can split treatment into monthly payments through Cherry.