What Is Gingivitis and Gum Disease?

If your gums bleed a little when you brush, it's easy to shrug it off — most people do. But that bleeding is usually the earliest sign of gingivitis, the mild, reversible stage of gum disease. Left alone, gum disease doesn't always stay mild. It can deepen into periodontitis, a more serious stage that damages the tissues and bone holding your teeth in place. The two stages share a name and a cause, but they behave very differently — and knowing which one you're dealing with changes what needs to happen next.

One name, two very different stages

Both stages start with plaque, the soft film of bacteria that constantly forms on teeth. When plaque isn't cleaned away, it irritates the gum edge. In gingivitis, that irritation stays on the surface: the gums look redder and slightly swollen, they bleed when you brush or floss, and they may feel tender — but the tooth itself is still held firmly, and the damage can be reversed with thorough cleaning. Periodontitis is what can develop when the inflammation is allowed to continue. The gum begins to pull away from the tooth, forming small pockets where more plaque collects out of a toothbrush's reach, and over time the supporting bone can be lost. Teeth may loosen, the bite can change, and persistent bad breath is common. Unlike gingivitis, that deeper damage doesn't simply grow back once it's cleaned.

The short video at the top of this page, "Risks of Periodontal disease" (about 80 seconds), looks at why dentists take the advanced stage seriously beyond the mouth itself — it lists wider health problems that periodontal disease has been linked with, including heart disease and stroke, which is one reason gum health comes up even in general medical check-ups.

What the dentist is actually looking for

A gum check is straightforward and shouldn't hurt. Your dentist looks at the colour and firmness of the gums, notes any bleeding, and uses a fine measuring probe, slipped gently between tooth and gum, to check the depth of the space there. Shallow readings with firm, pink gums suggest health; deeper pockets suggest periodontitis. Dental X-rays may be taken as well, because they show the level of the bone supporting the teeth — the clearest way to tell a surface problem from a deeper one. That distinction matters, because gingivitis and periodontitis are not treated the same way.

Cleaning it up: what treatment looks like

For gingivitis, treatment is mostly about removing the cause. A professional clean clears away plaque and any hardened deposits (tartar) above the gumline, and then careful daily brushing and cleaning between the teeth keeps it from building back up. The bleeding typically settles as the gums recover. For periodontitis, cleaning has to go deeper: scaling and root planing smooths the tooth roots below the gumline so the pockets can shrink back and the gum can reattach more closely. If you'd like to see what that involves, this site carries a video of the procedure, "Scaling and root planing", recorded over about three and a half minutes. More advanced cases may need further specialist care, and where teeth have already been lost, our article on dental implants explains one of the replacement options.

Keeping it from coming back

Here's the encouraging part: the early stage is genuinely in your hands. Plaque forms every day, so it's the daily routine that decides whether gingivitis returns — brushing twice a day, cleaning between the teeth where a brush can't reach, and keeping up regular dental check-ups so any hardened tartar is removed before it causes trouble. Smoking makes gum disease worse and harder to treat, so it's often part of the conversation too. The pattern to remember is simple: bleeding gums are a request for attention, not a reason to brush more gently and hope. Caught at the gingivitis stage, gum disease is one of the most fixable problems in dentistry; caught late, it's a condition to be managed rather than cured.

MedicalVideos.com has published trusted medical videos since 2007. The site was founded by Dr. Mohamed Ibrahim, MD, PhD — physician-scientist.

Frequently Asked Questions

Is gingivitis the same as gum disease?
Gingivitis is the earliest stage of gum disease — inflammation of the gum surface caused by plaque. Gum disease is the broader term, and its advanced stage, periodontitis, involves the deeper tissues and bone that support the teeth.

Can gingivitis be reversed?
Yes. Because gingivitis affects only the gum surface, it can usually be reversed with a professional clean followed by consistent brushing and cleaning between the teeth. The bone and tissue loss of periodontitis, by contrast, can't simply be regrown, which is why the early stage matters.

Why do my gums bleed when I floss?
Bleeding during flossing or brushing is a common sign of inflamed gums — healthy gums don't usually bleed. It's generally a reason to keep cleaning gently and thoroughly and to have it checked at a check-up, rather than a reason to stop flossing altogether.

Does gum disease hurt?
Often not, especially early on — gingivitis is usually painless, which is why bleeding may be the only clue. Periodontitis can also progress quietly for a long time before teeth feel loose or uncomfortable, so regular check-ups matter even when nothing hurts.

Educational only — this article is general information about gingivitis and gum disease, not medical advice and not a diagnosis. If your gums bleed regularly, a tooth feels loose, or you have pain or swelling in the mouth, see a dentist for an examination.