An explainer · not a diagnosis

What gum disease is, what reverses it, and who has to treat the rest

Early gum disease is often reversible at home. Once deposits harden below the gumline they are removed with instruments, in a surgery, by someone who has examined you. This entry explains the difference — and what the warning signs are.

Information only — no dentist has read this

What follows is something to read. It is not an assessment of your mouth and it is not a course of treatment. The Gumline Almanac editorial team wrote it from published sources we name and date, and nobody clinical has been over it. Only a licensed dentist who has examined you can say what is happening in your mouth, or what ought to be done about it.

Nothing here tells you what you have. Bleeding gums have several explanations and they are told apart by looking, measuring and sometimes X-raying — none of which a web page does.
Nothing here tells you to start, stop or change a medicine, and no dose appears anywhere on this site.
Where the published evidence is thin or contradictory we say so and leave it contradictory, rather than picking the flattering half.

Do not wait for a reading page

The NHS says to seek emergency care for a dental infection if you “are finding it hard to breathe, speak or swallow”, if you “have a swollen or painful eye” or sudden eyesight trouble, if you “have a lot of swelling in your mouth”, or if you “are finding it hard to open your mouth”. Facial swelling, fever or bleeding you cannot stop are reasons to contact a dentist or urgent care now, not to read on. A dental abscess, the NHS says, “will not go away on its own”.

In this entry

Gum disease is an infection of the tissues holding your teeth in place — the National Institute of Dental and Craniofacial Research defines it exactly that way. It comes in two broad stages, and the difference between them decides everything about what happens next: the early stage can often be reversed by daily brushing and cleaning between the teeth, and the later stage cannot be fixed at home by anyone, with any device, at any price.

The early stage, which home care can reverse

The NIDCR's wording is direct: early gum disease, caused by plaque build-up, "can often be reversed by daily brushing and flossing". This is the stage where gums are red, swollen or tender, and bleed easily when brushed. It is also the stage where the cheap advice on this site does the most work it will ever do — a manual brush, a fluoride toothpaste, and something between the teeth once a day.

The HSE's home-care instruction for gum disease is the same short list: brush twice a day, including last thing at night, for two minutes each time; floss daily "if you can", or use interdental brushes if floss is hard to handle; and use a toothpaste containing fluoride.

Nothing in that list is a water flosser. A water flosser may be a reasonable way to do the between-the-teeth part if it is the method you will keep up — see the comparison of the machines for what the evidence does and does not support — but it is a way of performing the step, not an extra step that does more.

The later stage, which it cannot

If it is not dealt with, the NIDCR says, gum disease "can spread to the bones supporting the teeth, making it painful to chew". The signs it lists are worth knowing by heart: gums that are red, swollen or tender; gums that bleed easily; gums that pull away from the teeth; loose or sensitive teeth; pain while chewing; and persistent bad breath.

At this point the deposits involved are no longer the soft film a brush removes. Hardened calculus sits on the root surface below the gum, and it comes off with instruments. The HSE describes the two procedures plainly. A scale and polish: "The hygienist will scrape away plaque and tartar from your teeth. They then polish your teeth to remove marks or stains." And root planing: "This is a deep clean under the gums that gets rid of bacteria and tartar or calculus from the roots of your teeth."

No jet of water does that, and no manufacturer in our comparison claims it does. This is the sentence the whole almanac exists to make unmissable.

How common is it

The CDC's figure is that nearly half — 42% — of all US adults aged 30 years and older have periodontitis, and that severe periodontitis affects about 8% of adults. That rests on national survey data gathered between 2009 and 2014.

We print the age band and the survey years every time because without them the number is a decoration. You will frequently see "half of adults have gum disease" quoted with neither, sometimes with a decimal point that implies a precision the underlying survey does not carry to a single year.

What raises your risk

The NIDCR names smoking as the most significant risk factor, and then lists older age, diabetes, genetics, stress, certain illnesses, obesity, AIDS and hormonal changes. Its prevention advice is the familiar pair — brushing twice a day with a fluoride toothpaste and flossing regularly — plus routine dental visits and quitting tobacco.

We are not going to tell you how often to have a check-up, because the honest answer is that it depends on your mouth. The HSE's wording is "at least once every 1 to 2 years, but more often if you need to", and whether you need to is a judgement made by someone who has looked.

When it is not a reading problem

Some of this stops being a question of routine and becomes a question of today. The HSE notes that necrotising periodontal disease "is an acute and painful infection of the gums and should be treated by a dentist" — not managed at home while you research.

And for a dental infection more generally, the NHS lists the signs that mean emergency care rather than an appointment: if you "are finding it hard to breathe, speak or swallow", if you "have a swollen or painful eye" or sudden eyesight trouble, if you "have a lot of swelling in your mouth", or if you "are finding it hard to open your mouth". Its flat statement about an abscess is worth remembering: it "will not go away on its own".

What to ask for, and what it is called

If you are sent for treatment, two things make the appointment easier to follow. Ask what is being proposed and whether it is a routine clean or a periodontal procedure — they are billed differently and they are different treatments. And ask for the treatment plan in writing with the procedure codes on it, because that is the document your insurer or plan will actually read. The entry on paying for a deep clean goes through what those codes are and why we will not quote you a national average price.

Questions about gums

Can I cure gum disease at home?

The early stage can often be reversed at home — the NIDCR says early gum disease caused by plaque build-up can often be reversed by daily brushing and flossing. The later stage cannot. Once calculus has hardened onto the root surface below the gumline it is removed with instruments by a dentist or hygienist, which is what a scale and polish or root planing is for. Any product promising to cure established gum disease at home is promising something no device on our comparison page claims.

My gums bleed when I brush. Is that gum disease?

It is one of the signs the NIDCR lists, along with gums that are red, swollen or tender, gums pulling away from the teeth, loose teeth and persistent bad breath — but a list of signs is not a diagnosis, and this site is not going to give you one. Bleeding that keeps happening is a reason to be examined. What we can say is that it is not normal and not something to wait out.

Will a water flosser stop my gums bleeding?

The 2019 Cochrane review found that toothbrushing plus an oral irrigator may reduce gingivitis in the short term, with no evidence for it in the medium term, and graded the whole field low to very low certainty. So the honest answer is that it might help a little, on short-term evidence the reviewers themselves distrust, and that it is not a treatment for bleeding gums. If your gums bleed regularly, the useful action is an examination, not a purchase.

Is a deep clean the same as a normal cleaning?

No. A routine clean deals with what is above and just at the gumline; root planing, as the HSE describes it, is a deep clean under the gums to remove bacteria and calculus from the roots of the teeth. They are different procedures, they are billed under different codes, and being quoted for one when you expected the other is a common surprise. Ask which one is being proposed and why.

Does gum disease come back after treatment?

This is exactly the question to put to the person treating you, because the answer depends on what stage you were at, what was done and what your own risk factors are — the NIDCR names smoking as the most significant of those. We have no source that would let us give you a rate or a timescale, so we will not invent one. What every source we read does agree on is that the daily home routine continues to matter afterwards.

The season of the gums

DailyBrush twice for two minutes with a fluoride toothpaste, and clean between the teeth once. The ADA does not mind which device does the cleaning between — it says the best method is the one you will actually keep doing.

MonthlyRun a vinegar-and-water mix through the machine, if you own one. Waterpik’s own instruction is one part white vinegar to two parts warm water, then a full tank of clean water after it.

Every 3–6 monthsReplace the tip. That is the maker’s own interval, not ours, and it is the cheapest part of owning one of these.

As advisedSee a dentist. We are not going to invent an interval for you: the HSE’s wording is “at least once every 1 to 2 years, but more often if you need to”, and whether you need to is a judgement made by someone who has looked in your mouth.