Photo of Dr. Lincoln Hirst BDSWritten by the Dental Fear Central Web Team and medically reviewed by Lincoln Hirst, BDS
Last updated on July 13, 2020

How to prevent gum problems (or stop gum disease from getting worse)

If you’re in a rush, here’s a really short summary:

  1. Brush twice a day for 2 minutes, ideally before breakfast and before going to bed.
  2. Use a rechargeable electric brush with a small round brush head.
  3. Clean between teeth using interdental brushes and/or floss once a day.
  4. Get your teeth professionally cleaned (every 6 months, or if you have gum disease every 3 to 4 months).
  5. Don’t smoke.
  6. Remove lip and tongue piercings.
  7. Also read our quick summary on how to prevent tooth decay.

If you’d like to find out more about the whys and hows, read on!

Table of Contents

What is gum disease and what causes it?

When you don’t brush your teeth for a while, you will notice a yellowish sticky paste that accumulates on them. This material looks like food debris, but it’s actually a film of bacteria which forms on the surface of the teeth and gums every day. This biofilm is called “plaque”.

Many of the bacteria that live in our mouths are harmless 1. But others happily munch away at the same food you’re eating and then excrete toxins and enzymes – using the grooves where your tooth meets the gum as a toilet of sorts. Bacteria thrive in the plaque environment and multiply until they make up nearly 100% of the mass of the plaque. It takes about 24 hours for plaque to form fully. This is why you should remove it from all tooth surfaces once a day.

Anaerobic gram-negative bacteria can cause gum disease

They may look pretty under a microscope, but not all bacteria are friendly!

This first stage of gum disease is called gingivitis and is usually easily reversed by following the tips on this page.

Gum disease (also known as periodontal disease) is painless, and most people are unaware that they have it. Over time, the bone which anchors the teeth in the jaw is gradually lost, making the teeth loose. If this is not tackled, the teeth may eventually fall out or have to be taken out because of pain.

Usually, gum disease progresses slowly and can be stopped from getting worse. Some people are genetically predisposed to developing gum disease. This is especially true for aggressive forms of gum disease.

There are specialist dentists for gums called periodontists who can help if you have more severe gum disease.

Why do my gums bleed when I floss or brush?

When your body notices the toxins that are excreted by the bacteria, it mounts a defence against them. It does this by creating lots of new little blood vessels to fight off the infection. It is these new blood vessels that make the gums look red and swollen. The bacteria attack the blood vessels, which then become fragile and bleed easily.

When this happens, we may think it’s best to stop brushing and flossing, because we’ve learnt that if something bleeds we should leave it well alone and let it heal…

But this is not how it works with gums. The somewhat counter-intuitive cure is to keep cleaning around and just below the gumline really well. This will eventually get rid of the toxins and stop the bleeding.

There are some systemic diseases (that is, diseases that affect a number of parts of the body) which can also lead to bleeding gums. However, most of the time, the bleeding is simply caused by plaque.

What can I do to stop my gums from bleeding, or to stop gum disease from getting worse?

Your mission is to remove the soft sticky biofilm deposit from every surface of every tooth (including just below the gum line). Plaque is very soft and easy to remove. You may have removed it with your nail at some time or other. If it does not come away easily, it is not plaque.

Such a hard deposit is tartar, also known as calculus, and no amount of brushing will remove it.

Plaque can start to harden within as little as 24 to 72 hours and turn into tartar – the exact amount of time it takes varies hugely from person to person. Some people are much more prone to tartar than others. They have saliva which is pretty rich in Calcium and Phosphate ions, which deposits onto the teeth like limescale on a kettle.

By removing the biofilm every single day, tartar doesn’t get a chance to harden – even if you’re prone to it.

How can I get rid of tartar?

A dentist or dental hygienist can remove tartar for you during a dental cleaning. Resist brushing harder, as this may cause abrasion.

You will find it much easier to keep your teeth clean once the tartar has been removed.

How do you do remove plaque?

There are two elements to cleaning every surface of every tooth:

  1. brushing and
  2. cleaning between the teeth.

How to brush your teeth well

Use a toothbrush with a small brush head (to get in hard-to-reach spots), and a pea-sized blob of toothpaste which contains 1350-1500ppm fluoride.

Electric toothbrushes are much more effective than manual ones for most people. The ones that come out on top for plaque removal in research studies are rechargeable oscillating rotating toothbrushes 2 – those in the Oral-B PRO, Smart, or Genius range.

You don’t need the top-of-the-range one – the difference in price is usually due to accessories, gimmicks and design. All the Oral-B brushes from the Pro 2000 upwards have the same number of rotations and oscillations, and clean equally well. Of course, they are still more expensive than manual ones (and the replacement brush heads are quite expensive), but there are often special offers both in shops and on Amazon.

The other good thing about these toothbrushes is that they will warn you and stop if you brush too hard. You can do a lot less damage with an electric brush compared to a manual brush.

Choose one of the small round brush heads, rather than the oblong/oval brush heads – they make it easier to clean each individual tooth.

Tip: Use 2 hands when you’re brushing, one to pull your lip out of the way so you can see what you’re doing and one to hold the brush. – Gordon Laurie, BDS

When brushing, make sure that you take your time and don’t rush – the key is to clean every surface of every tooth. This should take 2 minutes. Try not to go over 3 minutes to avoid causing toothbrush abrasion.

Watch how to brush teeth with an electric toothbrush

It’s a good idea to choose an order in which you brush your teeth and stick to it. If you always brush in the same order, then you are unlikely to miss some areas while doing others twice.

At the end, gently brush your tongue to remove bacteria which cause bad breath. You can also get a dedicated tongue scraper if you prefer.

Spit out the remaining toothpaste and don’t rinse, so you get the full benefit of the fluoride for preventing tooth decay. Swallowing a small amount of toothpaste is not dangerous.

How often should I brush, and when?

You should brush twice a day – brushing much more often than that could cause damage to your teeth and gums.

Ideally, you should brush first thing in the morning (before breakfast) and before going to bed. If you brush last thing before bedtime, the fluoride has a chance to work undisturbed during the night.

Don’t brush for 30 minutes after eating, or after drinking acidic drinks! 3

The reason is that food or drinks high in sugar and acids, for example, orange juice or sugary cereal, can lower the pH level in your mouth. This weakens the tooth enamel. If you brush straight after breakfast, you may scrape off the softened or weakened enamel.

Also, plaque builds up more quickly as we sleep because we produce less saliva. Even if you brush your teeth before bed, there will be plenty more plaque in the morning. Brushing before breakfast gets rid of the buildup of plaque.

Although brushing your teeth before breakfast would be ideal, it doesn’t fit in with everyone’s schedule. Don’t worry too much if it doesn’t suit you – as long as you brush last thing at night and one other time during the day (20 – 30 minutes after a meal), you’ll be fine.

If you’re worried about bits of breakfast being stuck between your teeth before heading out, try rinsing with water – this usually dislodges any food particles.

Cleaning between the teeth

You may find it impossible to clean between your teeth if you haven’t had a professional cleaning for a while, because of the build-up of hard deposits (tartar/calculus) between teeth. Things will be much easier once the deposits have been removed. Ask your dentist or hygienist which interdental cleaning method(s) they recommend for your teeth!

The bristles of the toothbrush don’t properly reach into the area in between teeth, just below the gumline of where the gums meet the teeth. Also, they don’t reach in between the “contact points” where two neighbouring teeth meet. There are several ways of cleaning these areas, depending on the size of your gaps and what you find easiest, for example:

  • Interdental brushes
  • Interdental rubber brushes
  • Floss

Often, a combination of these methods works best. You may want to floss and then use interdental brushes where spaces are wide enough.

Interdental brushes (Traditional and Rubber Interdental brushes)

Tepe brushes for interdental cleaning in different sizes

The most effective method for cleaning between teeth, especially between back teeth, is to use interdental brushes wherever the space between two teeth is big enough 4 5 6.

Back teeth (molars and premolars) are kidney-shaped at their base, so floss doesn’t clean the surfaces in between teeth as well as interdental brushes do:

Illustration of how interdental brushes clean between back teeth

Interdental brushes come in lots of different sizes and you’ll likely need to use a combination of sizes for different-sized spaces in between your teeth. They are colour-coded to make it easier to remember which ones to use where. They also come in different shapes to make it easier to access certain areas of your mouth. Ask your dentist or hygienist which size(s) and type(s) are right for your gaps, and how to use them.

The most popular brand of interdental brush is Tepe (see photo above).

Not everyone is a fan of the bristled interdental brushes. If you keep poking the metal bit into your gums, you may find rubber brushes easier. They look like this:

A rubber interdental brush

Examples include:

Wisdom Clean Between Brushes

TePe EasyPick

GUM Soft-Picks

Don’t use interdental brushes where the spaces in between teeth may be too narrow to safely accommodate them. If you’re unsure, ask your dentist or hygienist for advice!


If you have very narrow spaces between teeth and healthy gums, you may find that neither of the brushes above work for you. In that case, floss is the best option.

The other advantage of floss is that it gets in between the contact points where two neighbouring teeth touch. This is where plaque tends to accumulate, and it’s where cavities are most likely to form between teeth. Disrupting the biofilm in this area (when you slide the floss in and out) helps with preventing cavities in between teeth.

How to floss

How to floss

  1. Take about half an arm to an arm’s length (depending on the length of your arm and how generous you feel) of dental floss. Wind most of it around your left middle finger or index finger (the middle finger is recommended, but whichever is easiest for you). Wind the remaining floss around the same finger of the opposite hand. This hand will take up the used floss as you go along. If you’re left-handed, you may want to wrap most of the floss around your right middle finger or index finger instead (it’s easier to use your dominant hand for doing the winding).
  2. Hold the floss tightly between your thumbs and index fingers.
  3. Gently slide the floss between two teeth, using a gentle side-to-side motion. Be careful not to snap the floss between teeth.
  4. When the floss reaches the gum line, pull both ends of the floss in the same direction to form a C shape against one tooth. Pull the floss tightly and gently slide it up and down against one tooth, and especially below the gum line (see the round close-up between pictures 3 and 4 in the illustration above). Repeat this motion a few times so you know that you’ve cleaned the tooth’s surface thoroughly.
  5. Pull the floss against the other tooth and repeat the motion. Be very gentle and try not to scrape the floss too hard against your gums.
  6. Repeat this wherever two teeth are touching, and behind the very back teeth.
 Each time you move on to next space, use a fresh segment of floss and wrap the used one around the finger that starts off with the short end of floss.
  7. Once you’re finished, throw the floss away.

Some more tips:

  • A lot of websites say that it only takes a couple of minutes to floss. This can be disheartening if it takes you a lot longer – and if you have a small mouth, teeth which aren’t perfectly straight, very tight spaces or less-than-stellar dexterity, it almost certainly will take longer. It’s not a race, so take your time. You will probably find that you do get a bit faster as time goes on.
  • Have a road map of what order you’re going to floss your teeth in, and stick to it.

Which type of floss should I use?

Monkey demonstrating poor flossing technique

Technique is more important than the type of floss you use – but not all floss is created equal!

The easiest floss to use is non-shredding floss made of PTFE (Teflon): this includes Colgate Total Pro Gum Health Interdental Floss or Oral-B Pro-Expert Premium Floss in the UK, and Oral-B Glide in the US.

Alternatively, some people swear by fluffy expanding floss (e.g. Corsodyl Daily Expanding Floss, Sensodyne Gentle Floss Expanding, or GUM Access Floss), which is excellent for cleaning purposes but has a tendency to shred.

Most research appears to show that the type of floss is less important than actually using it. So choose a floss that works for you!

There are also special types of floss for use with implants, bridges, and braces (e.g. Oral-B Superfloss and Oral-B Glide Threader Floss).

Should I clean between teeth before or after brushing?

It doesn’t really matter. On the one hand, interdental cleaning before brushing removes gunk from between teeth, so that might make it easier for the fluoride in your toothpaste to get in there. On the other hand, brushing before interdental cleaning means that your teeth are still covered with fluoride, and the interdental brush or floss might then distribute some of the fluoride into the spaces.

So either option is fine. Interdental cleaning before brushing does have the advantage that you’re less likely to skip it.

Should I clean between teeth in the morning or at night?

It doesn’t matter whether you clean between your teeth at night or in the morning (or in the afternoon for that matter). The most popular time seems to be before brushing last thing at night. Find a time that suits you.

Ideally, interdental cleaning should be done once a day. If that feels overwhelming at first, start off by doing the bottom teeth one day and top teeth the next, until it becomes easier. Flossing, in particular, requires a degree of dexterity that doesn’t come naturally to everyone, but practice makes perfect (eventually!).

The floss keeps shredding and getting stuck!

Ideally, the floss should smoothly glide between the teeth. If you’re having problems with floss shredding between certain teeth, let your dentist and/or hygienist know so they can have a look at the problem for you. There can be many reasons, for example

  • the floss might snag on dental tartar that’s built up, and simply removing this tartar will stop the shredding (and make flossing much easier)
  • there could be an overhang or leftover cement from previous dental work – sometimes trimming or buffing the offending edge to make it smoother can solve or at least help with the problem

Your dentist or hygienist may also be able to show you an alternative technique to use in these spots.

Keep the floss taut when inserting and removing it from each gap. Hold it firmly against the side of the tooth in order to keep shredding to a minimum. Having plenty of floss makes it easier to keep it wrapped around your fingers and pulled tight.

My gums bleed when using interdental brushes or flossing!

If you haven’t used interdental cleaning methods before, or only once in a while, your gums will probably bleed – at least the first few times. This is because the bacteria which have been allowed to thrive have attacked the blood vessels. This has left the blood vessels fragile and prone to bleeding. Your gums may also feel tender and sore after interdental cleaning.

The good news is that if you keep using interdental brushes or flossing gently, most of the bleeding will usually stop within a week or two.

Is flossing pointless?

Flossing has received a bad press in recent years following the release of an Associated Press report in August 2016 under the headline “Medical benefits of flossing unproven”, which looked at research carried out over the last decade. For example, a review of 12 randomized controlled trials 7 found only “very unreliable” evidence that flossing might reduce plaque after one and three months (the review did find though that flossing in addition to toothbrushing reduces gingivitis compared with toothbrushing alone). The European Federation of Periodontology has released guidelines which state that interdental brushes are essential for treating and preventing gum disease, and that floss is of little value unless the spaces between your teeth are too tight for the interdental brushes to fit without hurting or causing harm 8.

However, the poor research evidence for flossing doesn’t mean that flossing is “pointless” or “doesn’t work”. It is more likely that most people didn’t floss very effectively (or perhaps even skipped it altogether), or that the research wasn’t very well designed.

If you’ve been successfully flossing up until now, don’t give up! Anecdotal evidence certainly suggests that daily flossing has a really positive effect on gum health.The key is to do it right.

If you want proof, try flossing one side of your mouth only (either the left or the right) for three weeks, then see how the other side reacts when re-introducing (or introducing) floss. Unless you are not at all susceptible to gum disease (genetics do play a role in this), you should notice the difference!

What about mouthwash?

Unless your dentist has prescribed you a mouthwash for a specific purpose (such as chlorhexidine gluconate for short-term treatment of gingivitis), there is no need for it. Mouthwash is NOT necessary for maintaining good oral health, and can even be counterproductive: using mouthwash after brushing your teeth will wash away the fluoride from the toothpaste (remember the “spit and don’t rinse” rule).

Professional cleanings

Most dental professionals would recommend having your teeth cleaned every 6 months (or more often if you have existing gum problems). This is also a chance to get advice for keeping your teeth and gums healthy. Everyone’s mouth is different, and you can get tailored tips from your hygienist or dentist.

In the UK, dental hygienists can provide these services directly, without the need to go through a dentist for a referral. So you can pick anyone you like – they don’t have to work at the same practice as your dentist.

What else can I do to keep my gums in good shape?

If you currently use tobacco products (cigarettes or smokeless tobacco such as snus), then cutting down or better yet quitting is a great way of improving gum health. Smoking causes people to have more dental plaque. It also lowers the level of oxygen in the bloodstream. This means that gum infections don’t heal well, making gum disease worse9.

How to quit smoking

Firstly, nicotine and the comfort that can be derived from the sucking motion are incredibly addictive. You do need a fair bit of motivation to quit – something which offsets the positives of smoking (like being soothed and feeling more alert).

Some possible reasons for quitting include:

  • concern about your own health
  • concern about the impact of smoking on your family
  • the cost and potential savings
  • a dislike of the tobacco industry and its tactics.

It can be useful to decide on one or more of these reasons to quit and read up on them using Google.

One book which has helped many people quit almost overnight is Allen Carr’s “Easy Way to Stop Smoking”.

While a lot of people do manage to quit virtually cold turkey using Alan Carr’s approach, others find it doesn’t work for them. After all, it takes a while to become a fully-fledged 20, 30 or 40 a day smoker, so it’s not surprising that breaking the habit of a lifetime won’t happen overnight.

Traditional nicotine replacement products tend to be pretty vile. Luckily, in recent years e-cigarettes have really taken off.

Vaping can help with quitting cigarettes

They have helped many people who thought they lacked the willpower to finally quit. There are many different models of e-cigarettes on the market, and even more flavours, especially online but also in vape shops. If you want to wean yourself off nicotine, then a system where you can use your own liquids is best. That way, you can gradually reduce the nicotine content.

The beauty of e-cigarettes is that they allow the quitting process to be broken up into easy, manageable stages.

For example, you can start off with e-liquids containing a fair amount of nicotine and gradually reduce the amount (over weeks or months) until you are able to use nicotine-free liquids. You can then continue using these, and gradually reduce the amount you vape over a period of weeks, or months, or years – whatever suits you.

If you’re finding it difficult to go without a cigarette for more than a few hours, the first week of switching to e-cigarettes will still require some willpower – in that case, you could have the occasional cigarette during the first week or so (cutting down each day until, by the end of the week, you have entirely replaced them with your e-cigarette).

For more ideas on quitting smoking, visit Smokefree (NHS).

Lip and tongue piercings

Lip and tongue piercings often cause trauma to the gums and localised gum disease. The best thing to do is to remove them 10.

You may also like:

How to prevent tooth decay (or stop it from getting worse)

Visit our forum for support and help with dental phobia, fear and anxiety!

Other Resources

Guidelines for Effective Prevention of Periodontal Diseases – Up-to-date guidelines for the general public from the European Federation of Periodontology.

Scottish Dental Clinical Effectiveness Programme SDCEP (2014). Prevention and Treatment of Periodontal Diseases in Primary Care – Dental Clinical Guidance (PDF, 116 pages)

Gum Disease (NHS) – An easy-read summary of symptoms, causes, treatments, and complications.

Periodontal Disease and Treatment – FAQs answered by the British Society of Periodontology

References and Footnotes

  1. The bacteria associated with periodontal diseases are predominantly gram-negative anaerobic bacteria and may include exotic-sounding species such as A. actinomycetemcomitans, P. gingivalis, P. intermedia, B. forsythus, C. rectus, E. nodatum, P. micros, S. intermedius and Treponema sp.[]
  2. Yaacob M, Worthington HV, Deacon SA, Deery C, Walmsley AD, Robinson PG, Glenny AM. Powered versus manual toothbrushing for oral health. Cochrane Database of Systematic Reviews 2014, No 6.[]
  3. Guidelines for Effective Prevention of Periodontal Diseases – Patient/Public Guidance[]
  4. Slot DE, Dörfer CE, Van der Weijden GA. The efficacy of interdental brushes on plaque and parameters of periodontal inflammation: a systematic review. International Journal of Dental Hygiene. 2008;6(4):253-264.[]
  5. Imai PY, X.; MacDonald, D. Comparison of interdental brush to dental floss for reduction of clinical parameters of periodontal disease: A systematic review. Canadian Journal of Dental Hygiene. 2012;46(1):63-78[]
  6. Poklepovic T, Worthington HV, Johnson TM, Sambunjak D, Imai P, Clarkson JE, Tugwell P. Interdental brushing for the prevention and control of periodontal diseases and dental caries in adults. Cochrane Database of Systematic Reviews 2013, Issue 12[]
  7. Sambunjak D, Nickerson JW, Poklepovic T, Johnson TM, Imai P, Tugwell P, Worthington HV. Flossing for the management of periodontal diseases and dental caries in adults. Cochrane Database of Systematic Reviews 2011, Issue 12.[]
  8. European Federation of Periodontology (2014). Guidelines for effective prevention of periodontal diseases.[]
  9. Kinane DF, Chestnutt IG. Smoking and periodontal disease. Crit Rev Oral Biol Med 2000;11:356-65.[]
  10. Lip piercing: prevalence of associated gingival recession and contributing factors. A cross-sectional study. Kapferer I, Benesch T et al. J Periodont Res 2007; 42: 177–183[]