Bleeding gums: what to do and when to worry

Why are my gums bleeding?

In the vast majority of cases, gums bleed because they are inflamed — and they are inflamed because dental plaque (biofilm) has built up along the gumline. The bacteria in that plaque irritate the tissue, which becomes red, swollen and tender, and the friction of a brush or floss is enough to make it bleed. Contrary to what many people believe, a healthy gum does not bleed when you brush.

Several factors aggravate or speed up this inflammation, even in people who brush their teeth:

• —Insufficient brushing or no flossing/interdental cleaning — plaque builds up where the brush cannot reach, especially between the teeth.
• —Smoking — one of the biggest risk factors and, ironically, one that can mask the bleeding, giving a false sense of health.
• —Poorly controlled diabetes — makes gums more prone to inflammation and slows healing.
• —Hormonal changes — pregnancy, menstruation or menopause make gums more reactive.
• —Certain medications — some blood-pressure drugs, anticoagulants and immunosuppressants affect the gums.
• —Stress, lack of vitamin C and a poor diet — weaken the tissues' defences.
• —Ill-fitting fillings or dentures and mouth breathing — which trap plaque and dry out the gum.

Gingivitis or periodontitis: what is the difference?

They are two stages of the same condition — gum disease — and understanding the difference changes everything, because one is reversible and the other is not.

In gingivitis, the inflammation is limited to the gum. There is still no loss of bone or of the tissues that hold the tooth in place. This is the stage where action pays off: with proper hygiene and a professional cleaning, the gum becomes firm and pink again, and the bleeding stops.

If gingivitis is left untreated, the inflammation advances deeper and becomes periodontitis — what used to be called "pyorrhoea". Pockets form between the tooth and the gum where bacteria settle, and the supporting bone begins to be destroyed. That lost bone does not regenerate on its own, which is why periodontitis can be controlled but not cured in the sense of turning back the clock. The earlier you act, the more tooth and bone you keep — and that is exactly why bleeding should never be ignored.

Which warning signs should you not ignore?

Bleeding is the earliest warning, but it rarely comes alone. Book an assessment if you notice one or more of these signs:

What can you do at home for bleeding gums?

Much of controlling gingivitis is in your hands, every single day. The key is to remove plaque thoroughly without harming the gum:

• —Brush twice a day for 2 minutes, with a soft-bristled brush and gentle strokes angled at 45° to the gumline — do not scrub hard.
• —Do not stop brushing the area that bleeds. It seems counter-intuitive, but the opposite is true: it is the accumulated plaque that keeps the inflammation going. Clean that area gently and the bleeding tends to ease within a few days.
• —Clean between the teeth every day — with floss or interdental brushes. This is where gingivitis begins and where the brush cannot reach.
• —Use an antiseptic mouthwash as a support during acute flare-ups, but for short periods only and never as a substitute for brushing and flossing.
• —Stop smoking — one of the measures that most benefits the gums, and it improves the response to any treatment.
• —Control diabetes and look after your diet — more vegetables, vitamin C and less sugar help the tissues recover.
• —Replace your brush (or electric brush head) every 3 months, or sooner if the bristles splay out.

Why is home care sometimes not enough?

Brushing and flossing remove soft plaque, but they do not remove tartar — plaque that has already hardened and calcified at and below the gumline. That tartar is a rough surface where more bacteria attach, keeping the inflammation active no matter how well you brush.

That is why, when there is bleeding, even the best home care almost always needs to be combined with a professional cleaning that removes what the brush cannot. And here the type of cleaning makes a difference — especially on gums that are already inflamed and sensitive.

How does GBT cleaning help control inflamed gums?

GBT (Guided Biofilm Therapy) is a professional cleaning protocol that, instead of starting with curette scaling, removes biofilm with the AIRFLOW® system — a jet of air, warm water and a very fine powder. On bleeding gums this is an important advantage: it cleans plaque effectively, including just below the gumline, but gently, with far less discomfort and far less bleeding than traditional scaling.

When there are deeper pockets, the PERIOFLOW® step takes the same gentle jet into those pockets and around implants, where periodontitis bacteria hide. And because the protocol begins by revealing the biofilm with a disclosing dye, we show you exactly where your brushing is falling short — turning the cleaning into a personalised hygiene lesson too.

To be clear: in gingivitis, GBT cleaning combined with good home habits usually resolves it. In established periodontitis, GBT does not replace the underlying periodontal treatment (such as deep scaling and root planing), but it fits very well into the maintenance appointments that keep the disease under control over time.

When should you book an appointment at Fábrica do Sorriso?

If your gums keep bleeding after a week or two of caring for them properly, or if you notice recession, looseness, persistent bad breath or pus, it is time for an assessment. At a periodontics appointment we measure the depth of the pockets, assess the bone (with an X-ray when needed) and explain to you — unhurried and with no sales scripts — what is happening and what makes sense to do.

We see patients in Almada, Fernão Ferro and Baixa da Banheira, Monday to Saturday, from 10:00 to 13:00 and from 14:00 to 19:00, welcoming patients from across the south bank of the Tagus (Margem Sul) — Seixal, Corroios, Cacilhas, Feijó, Sesimbra, Quinta do Conde, Moita, Barreiro and neighbouring towns. Bring your insurance or health-plan details and we will check the cover before your appointment.

The most common questions

Is it normal for gums to bleed when I brush my teeth?

No. A healthy gum does not bleed when you brush. Bleeding is the earliest sign of gingivitis — inflammation caused by dental plaque. The good news is that at this stage it is reversible with proper hygiene and a professional cleaning. Ignoring it is what allows it to progress to something more serious.

Should I stop brushing the part of the gum that bleeds?

No — quite the opposite. The bleeding comes from the accumulated plaque that keeps the inflammation going; if you stop cleaning, the plaque builds up further and the gum gets worse. Clean that area gently, with a soft brush and floss, and the bleeding tends to ease within a few days. If it persists, book an assessment.

Can periodontitis (pyorrhoea) be cured?

Gingivitis, the early stage, can be fully cured and reversed. Periodontitis already involves loss of supporting bone, which does not regenerate on its own — so it can be controlled but not reversed. With treatment and regular maintenance appointments it is perfectly possible to stabilise the disease and keep the teeth for many years. The earlier you act, the more you preserve.

Is GBT cleaning better for people with bleeding gums?

For inflamed, sensitive gums it tends to be more comfortable. Because AIRFLOW® removes biofilm with air, warm water and fine powder instead of scraping directly, there is less discomfort and less bleeding during the session, and the PERIOFLOW® step reaches the deeper pockets. It is a good option for stopping the inflammation, especially for people who avoided cleanings because of bad experiences.

Does smoking affect the gums?

Considerably. Smoking is one of the main risk factors for gum disease: it reduces blood flow to the gums, worsens bone loss and hampers healing and the response to treatment. It also masks the bleeding, so many smokers have advanced periodontitis without the early warning. Quitting smoking is one of the measures that most benefits the gums.