Gum recession happens when the gum tissue that surrounds your teeth pulls back or wears away, exposing more of the tooth or even the tooth’s root. It’s one of the most common dental problems, and it rarely has a single cause. Most cases involve a combination of bacterial damage, physical wear, and individual anatomy that makes some people more vulnerable than others.
Gum Disease Is the Leading Cause
The most significant driver of gum recession is periodontal disease, and the numbers aren’t close. A large meta-analysis found that people with periodontitis (the advanced form of gum disease) are nearly 10 times more likely to have gum recession than those without it.
The process starts with plaque, the sticky film of bacteria that builds up on teeth daily. When plaque isn’t removed, it irritates the gums and triggers gingivitis, the earliest and mildest stage of gum disease. At this point, gums may bleed when you brush, but no permanent damage has occurred.
If plaque continues to accumulate, the condition can progress to periodontitis. The gum tissue begins to pull away from the teeth, forming small pockets between the gum and tooth surface. These pockets trap even more bacteria and debris, creating a cycle that’s hard to break. Your immune system responds by generating inflammation below the gumline, and that inflammatory response, while intended to fight bacteria, actually destroys the connective fibers that anchor your gums to your teeth. The bone surrounding the teeth also begins to dissolve and resorb. This damage is irreversible. As the supporting structures break down, the gum line visibly retreats, and the deeper the pockets become, the harder they are to keep clean, which accelerates the whole process.
Brushing Too Hard Wears Gums Down
Aggressive toothbrushing is one of the most common mechanical causes of recession, and it’s entirely preventable. Brushing with too much pressure, using a hard-bristled toothbrush, or scrubbing with a back-and-forth sawing motion can physically wear away gum tissue over time. It can also erode tooth enamel at the gumline.
Several factors compound the problem: how frequently you brush, how long each session lasts, the stiffness of your toothbrush bristles, and even which hand is dominant (people tend to apply more force on the opposite side of the mouth from their dominant hand). Abrasive toothpastes, particularly whitening formulas with harsh particles, add another layer of mechanical stress. The damage from aggressive brushing is gradual, so you may not notice it for years. Switching to a soft-bristled brush and using gentle, circular strokes rather than forceful scrubbing can stop the progression.
Your Genetics Set the Stage
Not everyone’s gums are equally resilient, and a lot of that comes down to inherited anatomy. Gum tissue thickness is a genetically determined trait, and it plays a major role in how well your gums hold up against daily stress.
People with naturally thick gum tissue have a significant advantage. Thick gums resist trauma better, show less visible inflammation, and can even partially recover (a process called “creeping attachment”) after minor damage. People with thin gum tissue are in a tougher position. Thin gums appear almost translucent, have a narrow band of firmly attached tissue, and often sit over thin or minimal bone underneath. This combination makes them considerably more prone to recession from brushing, inflammation, or dental procedures.
Tooth shape matters too. Narrow, tapered teeth tend to be surrounded by thinner gum tissue, while wider, more square-shaped teeth are typically associated with thicker gums. The position of a tooth in the arch also influences tissue thickness. None of these factors are within your control, but knowing you have thin tissue can help you and your dentist take a more protective approach early on.
Grinding and Clenching
Chronic teeth grinding (bruxism) and clenching place excessive force on your teeth and the structures supporting them. Over time, this repeated stress can damage the bone and gum tissue around affected teeth, contributing to recession. Many people grind their teeth during sleep without realizing it, so the first clue is often a dentist noticing wear patterns on the teeth or gum changes at a routine visit. A nightguard can redistribute the force and protect both teeth and gums.
Smoking and Alcohol Use
Smoking is a well-established risk factor for gum recession. Smokers are roughly 84% more likely to develop recession than nonsmokers. Tobacco reduces blood flow to the gums, impairs the immune response to bacterial infection, and slows healing after any kind of tissue damage. This means smokers are more susceptible to gum disease in the first place and less able to recover from it. Alcohol consumption has also been identified as an independent risk factor, though the association is not as strong as with smoking.
Orthodontic Treatment
Braces and other orthodontic appliances move teeth through bone, and there’s a common concern that this can cause gums to recede. The reality is more nuanced. At the end of active orthodontic treatment, only about 5.8% of teeth show any recession, and less than 1% show recession greater than one millimeter. However, during the retention period after braces come off, the picture changes: about 42% of teeth eventually develop some degree of recession, though severity remains limited, with only 7% exceeding one millimeter.
Interestingly, the specific tooth movements that people worry about most, like tipping the lower front teeth forward, don’t appear to increase recession risk. Widening the upper arch has only a weak correlation with later recession. The recession that shows up after orthodontics likely has more to do with the patient’s underlying tissue type and oral hygiene habits than with the mechanics of the treatment itself.
Other Contributing Factors
A high frenulum attachment, where the small fold of tissue connecting your lip or cheek to your gums sits too close to the gumline, can pull on the tissue and contribute to localized recession. This is particularly common on the lower front teeth and can be corrected with a minor surgical procedure.
Occlusal trauma, meaning a misaligned bite that puts uneven pressure on certain teeth, can also play a role. When specific teeth absorb more force than they’re designed for during chewing, the surrounding bone and gum tissue can break down over time. Crooked or crowded teeth create areas that are harder to clean, letting plaque accumulate in spots where a toothbrush can’t easily reach.
Hormonal changes during pregnancy, puberty, and menopause can make gums more sensitive to inflammation and temporarily more vulnerable to damage. Piercings on the lip or tongue that rub against the gums are another surprisingly common cause of localized recession, particularly on the inner surface of the lower front teeth.
Why Early Recession Matters
Gum recession is slow, often painless in the early stages, and irreversible once it happens. The gum tissue doesn’t grow back on its own. Mild cases may only require changes in brushing habits and more frequent professional cleanings to prevent further loss. More advanced recession, especially when tooth roots become exposed, can lead to sensitivity to hot and cold, increased risk of root decay, and cosmetic concerns. In severe cases, a gum graft procedure can cover exposed roots by transplanting tissue from another area of the mouth.
The most practical thing you can do is address the modifiable causes: use a soft-bristled brush with gentle pressure, stay consistent with flossing to keep plaque from building up below the gumline, and quit smoking if that applies. If you grind your teeth, a nightguard protects against ongoing mechanical damage. Catching recession early gives you the most options for slowing or stopping it before it reaches a point where surgical intervention becomes necessary.