The Inflammation You Can See: What Your Gums Reveal About the Rest of Your Body

By Dr Samintharaj Kumar, dental surgeon and owner of Nuffield Dental

A visible checkpoint

Most chronic, low-grade inflammation in the body is invisible to us. Gum inflammation is different. It can show up as bleeding, swelling or redness, and a dental examination can measure it. That makes the gums an unusually accessible checkpoint in a thoughtful healthspan plan.

I want to be precise about what that does, and does not, mean. Inflamed gums do not diagnose heart disease, diabetes or another condition. Nor does an association between gum inflammation and a blood marker prove that one caused the other. But the mouth can offer useful information about one potential source of inflammatory burden, in a place we can examine directly.

That matters in Singapore, where the 2019 National Adult Oral Health Survey, published in 2024, found that more than half of adults had moderate-to-severe periodontal disease, with prevalence rising with age. Gum health deserves attention not only when a tooth hurts, but also as part of an ongoing picture of health.

Putting a number on gum inflammation

One way researchers quantify periodontal inflammation is PISA: periodontal inflamed surface area. It estimates, in square millimetres, the total area of bleeding pocket epithelium around the teeth. Clinicians calculate it using periodontal measurements, including bleeding on probing and pocket depth or attachment level, with recession factored into the assessment.

The concept was set out in a 2008 paper introducing PISA. Rather than simply labelling disease by grade or stage, PISA aims to describe the extent of inflamed tissue across the mouth. It is a research measure, and not every patient will have a PISA score calculated in routine care. But the underlying idea is practical: record findings clearly and compare them over time.

A single number cannot explain why inflammation is present, how a person feels, or what their overall medical risk is. It is one part of an assessment, not a verdict.

What blood-marker studies are finding

The Otassha Study, published in the Journal of Clinical Periodontology in May 2025, examined 470 community-dwelling older adults in Japan, whose mean age was about 73. Researchers found that higher PISA was associated with higher serum CRP and IL-6, and with a higher composite score combining CRP, IL-1β, IL-6 and TNF-α.

CRP and IL-6 are markers involved in the body’s inflammatory response. They are not specific to periodontal disease: many health conditions and other influences can affect them. Still, the Otassha findings add to earlier cross-sectional research. The SONIC study found an association between PISA and high-sensitivity CRP in older Japanese adults. A 2026 study in Diagnostics also reported cross-sectional associations between PISA, hs-CRP and HOMA-IR in periodontal clinic patients.

The important qualification is the study design. These findings show that measures were associated at a point in time. They cannot tell us whether gum inflammation raised the blood markers, whether systemic factors contributed to gum inflammation, or whether shared factors (such as age, smoking or metabolic health) influenced both. So I would not tell a patient that a high PISA proves they have systemic inflammation. I would say it gives us a reason to take their periodontal health seriously and consider the wider context.

What treatment may change

Periodontal treatment aims first to control disease in the mouth. Researchers have also asked whether treating gum inflammation may affect markers in the blood.

Recent systematic reviews and meta-analyses of non-surgical periodontal treatment report reductions in CRP after treatment. One 2024 review of randomised trials estimated an average CRP reduction of about 0.63 mg/L, while also noting variation between studies and lower certainty for that finding. Other reviews report that reductions in inflammatory markers may be most apparent around three to six months, but results differ between populations and studies.

That is encouraging as a biomarker finding. It is not proof that treatment prevents heart attacks, strokes or deaths. Changes in a blood marker do not automatically translate into a proven change in a major health outcome. I would not promise that treating periodontal disease will protect a patient from cardiovascular disease. I would recommend treating periodontal disease because it affects oral health, and explain that research is also exploring possible effects beyond the mouth.

Tooth loss, mortality and a careful interpretation

A 2025 analysis of data from about 13,000 adults in a Chinese cohort reported an association between complete tooth loss and higher all-cause mortality. The adjusted hazard ratio was about 1.34. The authors also examined whether hs-CRP might help explain that association, reporting a small mediation effect of around three per cent.

This is worth noting, but not overreading. The analysis does not establish that tooth loss caused earlier death. Tooth loss can reflect many factors, including dental disease, access to care, diet, smoking and general health. The small mediation estimate suggests hs-CRP accounted for only a limited part of the observed association; most of it was not explained by that pathway. It is a reminder that oral and general health may intersect in several ways, not evidence for a simple cause-and-effect story.

A useful part of a longevity plan

A longevity plan should not turn every observation into a diagnosis. It should make sensible use of information that is already available. At a dental review, we can examine the gums, measure pocket depths, record bleeding and monitor changes. Compared with investigating systemic inflammatory disease, a periodontal assessment is a relatively low-cost way to quantify one visible source of inflammation, though it is not a screening test for systemic disease itself.

This fits alongside, rather than replaces, the other parts of integrated care. In earlier writing, I have discussed why I ask about blood sugar before treating gums, and why sleep, stress and blood pressure belong in a wider health conversation. These are different faces of the same principle: health factors can overlap, so it is useful to share relevant information between clinicians. A gum assessment does not replace a medical check-up; it can add a clear oral-health finding to the picture.

What you can do

Start with effective daily biofilm control. Brush carefully twice a day with fluoride toothpaste, and clean between the teeth with a method that suits your mouth. If your gums bleed persistently, do not simply assume that brushing is the problem and stop cleaning the area. Arrange a professional review so the cause can be assessed.

At a dental appointment, ask what was measured and whether the findings can be compared at your next visit. A record of bleeding, pocket depths and other periodontal measurements is more useful over time than relying only on whether your gums look better on one particular day. Follow the recommended plan for professional care, and keep your dentist informed about relevant medical conditions and medicines.

If you have concerns about blood sugar, blood pressure, smoking or other health factors, discuss them with the appropriate healthcare professional. They may be relevant to your overall health and to periodontal care, but they cannot be assessed from your gums alone. A holistic dentist in Singapore should be willing to see oral findings as part of a wider health conversation, while staying clear about the limits of dental assessment.

The gums are one of the few inflamed surfaces we can examine and chart in millimetres. What might a measured gum review add to the way you look after your health?

For an assessment, contact Nuffield Dental

This article is for general information only and is not a substitute for individual assessment or medical advice. Associations do not prove causation, and no treatment outcome can be guaranteed.