What Causes Receding Gums? 8 Real Reasons Your Gums Pull Back

Receding gums are most often caused by gum disease, where bacteria in plaque destroy the gum and bone that hold the gum line in place. Genetics, smoking, teeth grinding, tooth position, and aggressive brushing all add to the risk. In most cases it is several of these working together, not a single villain. Recession is common too: studies suggest well over half of adults aged 30 and older have at least one tooth with some root exposure, and the figure climbs steeply with age. The reason it matters is simple — gum, once lost, does not grow back on its own, so finding the cause early is what protects your teeth.

What actually counts as a "receding gum"?

Gum recession happens when the gum margin — the edge of pink tissue that hugs each tooth — drifts down toward the root. Dentists call it gingival recession. The landmark we measure from is the cementoenamel junction, the line where the hard white crown of the tooth meets the softer root surface. When gum sits below that line, root is exposed.

That exposed root is the whole problem. The crown of your tooth is wrapped in enamel, the toughest material your body makes. The root has no enamel — it is covered by a thinner, softer layer called cementum that wears and decays far more easily. So a receding gum trades a protected tooth for a vulnerable one, which is why recession so often shows up first as sensitivity to cold, sweet, or a toothbrush passing over a particular spot.

Two quick myths to clear up before we go further. Recession is not the same thing as a tooth "growing longer" — the tooth stays put; the gum moves. And recession is not simply a part of ageing. It becomes more common with age, but the evidence that ageing itself causes it is weak. Older mouths have just had more years for the real causes to act.

Gum disease: the cause behind most recession

If you remember one cause, make it this one. By a wide margin, the most common driver of gum recession is periodontal disease — gum disease — and the recession is the visible tip of a problem happening below the surface.

Here is the chain of events. Plaque, the soft film of bacteria that forms on teeth every day, collects along the gum line. If it is not removed, it irritates the gum (the early, reversible stage called gingivitis) and then hardens into tartar that brushing cannot shift. Left there, the bacteria provoke an immune response that, over months and years, breaks down the fibres and bone anchoring the gum to the tooth. As that support is lost, the gum has nothing to hold onto and migrates downward. That advanced stage is periodontitis.

In one epidemiological study of gum recession, plaque accumulation was the single most frequently associated factor, with faulty brushing close behind — a reminder that what you fail to clean off matters at least as much as how you brush. The practical signal is that recession from gum disease rarely travels alone. It tends to come with bleeding when you brush, puffy or red gums, persistent bad breath, and in later stages, teeth that feel slightly loose.

This is also where a lot of online advice goes wrong. People see a receding gum, assume they have been brushing too hard, switch to barely touching their teeth — and the underlying plaque problem gets worse, because gentle and ineffective are not the same thing. If gum disease is the cause, the answer is better cleaning and professional removal of tartar, not less cleaning. A thorough scaling and polishing clears the hardened deposits you cannot reach at home and is usually the first step a dentist recommends. If your gums hurt but the tooth itself looks healthy, our guide on gum pain when the tooth looks fine walks through what that can mean.

Does brushing too hard really cause it?

This is the explanation everyone reaches for, so it deserves an honest answer: the science is much less settled than the confident headlines suggest.

Two systematic reviews published in the Journal of Clinical Periodontology — the main bodies of pooled evidence on this question — both concluded that the data to support or refute a link between toothbrushing and gum recession are inconclusive. That is a genuinely surprising finding for most patients, and worth sitting with. It does not say brushing is irrelevant. It says the studies we have are not strong enough to prove toothbrushing alone causes recession, partly because it is hard to separate brushing from everything else going on in a mouth.

What those reviews did flag is that certain brushing habits show up alongside recession more often: a hard, horizontal scrubbing motion rather than gentle circles, a stiff-bristled brush, brushing very vigorously, and how frequently you change a worn brush. So the sensible reading is this — overzealous scrubbing probably does not start recession out of nowhere, but on a gum that is already thin or under strain, it can plausibly tip things along and wear a notch into the exposed root.

In our clinic we often see this on the upper canines and premolars of right-handed patients who scrub hard left-to-right — a textbook pattern. The fix is not to stop brushing. It is to switch to a soft brush, hold it at a 45-degree angle to the gum, and use small, gentle movements. Many electric brushes now include a pressure sensor that buzzes when you press too hard, which takes the guesswork out of it. So: can brushing contribute? Yes, in the right circumstances. Is it the lone cause people assume? The evidence says be skeptical.

The hand you were dealt: thin gums, genes, tooth position

Some people do everything right and still develop recession, and the reason usually traces back to anatomy they were born with.

The biggest factor here is gum thickness — what dentists call gingival biotype or phenotype. A thin, delicate band of gum over a tooth has far less margin for error than a thick, robust one. Thin tissue recedes more readily under any insult, whether that is brushing, inflammation, or movement of the tooth. You can often guess your own biotype: if your gums look scalloped and the underlying tooth shape shows through, your tissue is probably on the thin side. Research suggests a meaningful proportion of people — roughly a third by some estimates — carry a genetic predisposition to gum problems regardless of how diligent they are.

Tooth position is the other anatomical piece. A tooth that sits crowded, rotated, or tipped slightly outside the arch has thinner bone and gum covering its outer surface — sometimes a gap in the bone called a dehiscence. There is simply less tissue there to begin with, so recession appears earlier and more easily. This is why lower front teeth, which crowd so commonly, are among the most frequent sites for recession.

Worth being precise about orthodontics here, because it gets blamed a lot. The evidence does not support the idea that braces alone cause recession. What can happen is that moving a tooth into a position where the bone plate is very thin sets the stage, and then a direct cause does the damage. Done well, with the tooth kept within its bony envelope, orthodontic treatment can actually reduce recession risk by lining crowded teeth up so they are easier to clean. If crowding is part of your picture, straightening with braces or clear aligners can be part of the long-term solution rather than the problem.

Smoking, grinding, piercings and hormones

Beyond gum disease and anatomy, a cluster of lifestyle and habit factors quietly push gums to recede. None of them is exotic — most people have at least one.

Smoking and tobacco sit near the top. Tobacco use is one of the strongest modifiable risk factors for gum disease, and reviews have found smokers are roughly twice as likely to have gum recession as non-smokers. Smoking thickens plaque, starves the gums of blood supply, and blunts the body's ability to heal — a combination that accelerates tissue loss and, frustratingly, masks the bleeding that would otherwise warn you something is wrong. Smokeless tobacco and the habit of tucking a dip against the same patch of gum cause very localised, often severe recession exactly where it sits.

Teeth grinding and clenching (bruxism) load the teeth with forces they were not designed to take repeatedly. Heavy, off-axis pressure flexes the tooth and stresses the gum and bone at the neck, and over time this can contribute to recession and to those small wedge-shaped notches at the gum line. If you wake with a tight jaw, sore temples, or a partner who hears grinding at night, this may be part of your story, and a custom night guard can take the load off.

Oral piercings are an underrated cause. A lip or tongue stud that rests against the gum, especially the lower front teeth, rubs and traumatises the same spot thousands of times a day. One body of research reported gum recession in around a third of people with oral piercings — a strikingly high figure for something so avoidable.

Hormonal shifts round out the list. Surges in oestrogen and progesterone during puberty, pregnancy, and menopause make gums more reactive to plaque and more prone to inflammation. Pregnancy gingivitis is common and, if it is not kept in check, the inflammation can contribute to recession. The hormones do not destroy gum on their own, but they lower the threshold at which plaque does damage. Persistent bleeding gums or a strange metallic taste in the mouth can be early hints that gum inflammation is brewing.

How to tell if your gums are receding

Recession is sneaky because it is slow and, early on, painless. By the time most people notice, it has been progressing quietly for a while. A few honest signs to watch for:

• Teeth that look longer than they used to, or one tooth that looks longer than its neighbour.
• A "notch" or step you can feel with your fingernail or tongue where the gum meets the tooth.
• New sensitivity to cold, heat, or sweet things, concentrated near the gum line.
• A visible difference in colour — exposed root is slightly yellower than the whiter crown above it.
• Gaps opening between teeth near the gum, where there used to be a snug pink triangle.

One caution worth repeating: sensitivity has more than one cause, and not all of it is recession. A sharp jolt that vanishes the instant the trigger is gone behaves very differently from a deep ache that lingers, and the difference matters for what is going on inside the tooth. We cover that distinction in detail in sharp versus lingering tooth sensitivity. If you are unsure which you have, that is exactly the kind of thing a dentist can settle in a few minutes with a proper look.

Can receding gums grow back?

No — and this is the part patients least want to hear. Once gum tissue has pulled away from a tooth, it does not regrow naturally. Gum is not like skin; it has no spontaneous capacity to crawl back up and re-cover an exposed root. Any product promising to "regrow" your gums with a rinse or paste is selling something that does not exist.

So what can be done is split into two goals: stop it getting worse, and where it matters, surgically restore coverage. The right path depends entirely on the cause and severity, which is why a diagnosis comes first.

How well does surgery actually work? It is genuinely good for the right defect, but not magic, and honesty here matters. Pooled evidence on root-coverage grafts for the more straightforward, isolated recessions reports mean root coverage in the region of 70%, with complete coverage in roughly a third of cases — and outcomes drop off for deeper defects where bone between the teeth has already been lost. Translated: catch recession early and a graft can do a lot; leave it until bone is gone and even surgery has limits. That asymmetry is the whole argument for not waiting.

How to stop recession getting worse

Prevention is unglamorous and it works. Because gum does not come back on its own, the real win is halting recession while you still have tissue to protect — and almost all of that is within your control.

Keep the gum line clean without scrubbing it raw: a soft brush, a gentle 45-degree angle, and something to clean between teeth daily, since that is where brushing cannot reach and where gum disease loves to start. If you smoke, stopping is the single highest-value change you can make for your gums. If you grind, ask about a night guard. And keep your dental check-ups, because a dentist measures recession with a small probe and catches the early millimetres long before you would notice them in the mirror.

The thread running through every cause in this article is the same: recession is the body keeping score of inflammation, force, and anatomy over years. You cannot change your genes or rewind the gum you have already lost — but you can take the pressure off the causes that are still active, and that is usually enough to stop the slide. The earlier you act, the more tooth you keep.