People with severe gum disease have heart attacks and strokes more often than people with healthy gums. Researchers agree on that much. What they have not shown is that gum disease is the cause, or that having your gums treated will stop a heart problem from happening. Both points matter if you are deciding how seriously to take bleeding gums.
Two conditions that tend to turn up together
Periodontitis is the advanced form of gum disease, where inflammation has moved below the gum line and started to destroy the ligament and bone around the teeth. Large population studies have repeatedly found it to be more common in people with atherosclerotic cardiovascular disease, the artery narrowing behind most heart attacks and strokes.
In 2026 the American Heart Association published an updated scientific statement on this question in Circulation (Tran and colleagues). It brought together the research published since the association's 2012 statement, including genetic studies, trials of gum treatment and studies of inflammatory markers in the blood. The statement also points out that gum disease is more common in under-resourced communities, and it lists several areas where more research is still needed.
Why researchers think the gums could affect the arteries
Two routes are being studied. The first is direct: inflamed gum pockets bleed easily, and bacteria from them can enter the bloodstream for short periods, for example during chewing or brushing. The second is indirect: periodontitis keeps the body in a low-grade inflammatory state, and long-term inflammation is part of how artery plaques form and become unstable.
Both ideas are plausible, but a plausible mechanism is not proof. Gum disease and heart disease share many of the same risk factors, so some of the overlap may simply be the same people carrying the same risks.
| Shared risk factor | Link to gum disease | Link to heart disease |
|---|---|---|
| Smoking | One of the strongest risk factors for periodontitis | One of the strongest risk factors for heart attack and stroke |
| Diabetes | Raises the risk and severity of gum disease | Raises cardiovascular risk |
| Poor diet and excess weight | Associated with more gum inflammation | Associated with higher cardiovascular risk |
| Older age | Gum disease becomes more common with age | Heart disease becomes more common with age |
Gum treatment lowers inflammation, but heart events are another matter
Trials of gum treatment have looked at blood markers of inflammation. A 2025 meta-analysis in the Journal of Evidence-Based Dental Practice (Su and colleagues) pooled 21 publications and found that non-surgical periodontal treatment lowered C-reactive protein and several other inflammatory markers in people with coronary artery disease. That is a meaningful finding, but a fall in a blood marker is not the same as fewer heart attacks.
On the outcome that matters most, the evidence is thin. A Cochrane review published in 2022 (Ye and colleagues) looked for trials testing whether periodontal treatment prevents cardiovascular disease and found very low-certainty evidence, too little to draw conclusions either way. Until larger trials report, gum treatment should be thought of as care for the mouth that may have wider benefits, not as a heart treatment.
What this means day to day
The useful advice does not depend on how the research settles. Brush twice a day with fluoride toothpaste, clean between the teeth daily, do not smoke, keep diabetes and blood pressure under control, and have your gums checked regularly by a dentist or OHT so problems are found early.
Gums that bleed, swell or pull back from the teeth deserve attention. Our articles on swollen gums and whether receded gum tissue grows back explain the common causes. If you have been told you need a deep clean, read about scaling and root planing or our shorter guide to what a deep clean involves.
If you have a heart condition, tell your dental team about it and bring a list of your medicines, particularly blood thinners. Never stop or change a blood thinner yourself before dental treatment; your dentist will confirm any plan with your GP or prescriber. If you are waiting for heart valve surgery or a joint replacement, our guide to a dental check before heart surgery or joint replacement explains why surgeons often ask for one first.
Questions we are often asked
Will treating my gums protect my heart?
It has not been shown to. Gum treatment can reduce inflammation in the mouth and lower some inflammatory markers in the blood, but trials have not yet shown fewer heart attacks or strokes as a result.
If my gums bleed, does that mean my heart is at risk?
Not on its own. Bleeding gums are a sign of gum inflammation, which is very common and often reversible. It is worth treating for the sake of your teeth and gums, and it is a good prompt to keep up with your general health checks too.
Should my dentist know about my heart condition?
Yes. Your heart history and medicines help your dentist plan treatment safely, and some heart conditions need extra precautions for certain procedures.
A gum check is a straightforward place to start. Our team at Lumi Dental can measure your gums and suggest a care plan that suits you. See our current offers or book a check-up and clean.
This article is general information only and is not a substitute for personalised dental or medical advice. Please see a dentist and your doctor for advice about your own situation.
