Gums recede when the tissue surrounding your teeth wears away or pulls back, exposing more of the tooth or its root. It happens gradually, which is why many people don’t notice it until their teeth look longer than usual or they feel a sharp zing of sensitivity when drinking something cold. The causes range from brushing habits to genetics to gum disease, and in most cases, more than one factor is at play.
Gum Disease Is the Most Common Cause
Periodontal disease, the infection and inflammation of gum tissue caused by bacterial buildup, is the leading driver of gum recession. When plaque (the sticky film of bacteria on your teeth) isn’t removed regularly, it hardens into tartar. That tartar sits along and below the gumline, triggering chronic inflammation that slowly destroys the tissue and bone supporting your teeth. As that support erodes, the gums pull away.
Gum disease is remarkably common. About 4 in 10 U.S. adults aged 30 and older have some level of periodontitis, and that number jumps to roughly 60% among adults 65 and older, according to CDC data. Periodontitis is staged on a scale from I to IV based on how much attachment and bone loss has occurred, then graded A through C based on how quickly it’s likely to progress. Smoking and poorly controlled diabetes both push the grade higher, meaning faster progression and harder treatment outcomes.
You Might Be Brushing Too Hard
Aggressive brushing is one of the most underappreciated causes of recession, and it often affects people who think they’re taking great care of their teeth. Scrubbing hard with a back-and-forth sawing motion, or using a toothbrush with medium or hard bristles, can physically wear down gum tissue over months and years. The damage tends to show up on the outer surfaces of teeth, particularly canines and premolars, where people naturally apply the most pressure.
Switching to a soft or ultra-soft bristled brush and using gentle, short strokes (or a pressure-sensing electric toothbrush) can stop the damage from getting worse. If you notice your brush bristles fanning out within a few weeks, that’s a reliable sign you’re pressing too hard.
Genetics and Gum Thickness
Some people are simply born with thinner gum tissue, and that makes a real difference. Gum thickness is a genetically determined trait. People with a thick tissue type have a more robust, resilient layer of gum that tolerates inflammation, minor trauma, and even surgical procedures relatively well. Those with a thin type have tissue that’s more delicate, nearly translucent, with a narrow band of firmly attached gum and typically thinner bone underneath.
Research in the Journal of Orofacial Sciences found that nearly 74% of sites showing recession had a thin gum type, even in patients without periodontal disease. That means if your gums are naturally thin, you can develop noticeable recession from everyday stresses like brushing or minor crowding that wouldn’t bother someone with thicker tissue. You can’t change your genetics, but knowing you have thin gums helps you and your dentist take a more proactive approach to monitoring and prevention.
Teeth Grinding and Clenching
Bruxism, the habit of grinding or clenching your teeth, generates enormous mechanical stress. The forces involved can exceed ten times the pressure of normal chewing. That strain doesn’t just affect your teeth and jaw muscles. It transfers directly to the periodontal ligament (the connective tissue anchoring each tooth to the bone) and to the gums themselves.
Repeated clenching and grinding create micro-injuries in the gum tissue and supporting bone. Individually, each episode is minor. But they accumulate over time, weakening the structures that hold gums in place and gradually causing tissue to pull away from the tooth. Many people grind at night without realizing it, so unexplained recession, especially combined with jaw soreness or worn-down tooth surfaces, can be a clue that bruxism is involved. A custom night guard reduces the force on your teeth and gives those tissues a chance to stabilize.
Smoking, Vaping, and Nicotine
Tobacco use accelerates gum recession through a specific mechanism: nicotine restricts blood flow to the gums. Your gum tissue depends on a healthy blood supply to deliver immune cells that fight the bacteria in plaque. When that supply is reduced, infections take hold more easily and the tissue heals more slowly after any kind of injury or inflammation. The result is faster breakdown of gum attachment.
Vaping carries similar risks. While it avoids the tar and combustion byproducts of cigarettes, the nicotine still alters blood flow to oral tissues and suppresses immune function in the same way. People who smoke or vape also tend to develop more tartar and respond less predictably to periodontal treatment, which makes existing recession harder to manage.
Other Contributing Factors
Misaligned teeth can create uneven forces during chewing, putting extra pressure on certain areas of gum tissue. A tooth that sits slightly outside the arch or is rotated may have thinner bone and gum coverage on one side, making it more vulnerable to recession. Orthodontic treatment can sometimes help by redistributing those forces more evenly, though in some cases orthodontic movement itself needs to be monitored carefully to avoid thinning the tissue further.
Direct trauma or injury to the gums, from a sports impact, a lip or tongue piercing that rubs against the tissue, or even a poorly fitting dental appliance, can also trigger localized recession. Hormonal changes during pregnancy or menopause can make gum tissue temporarily more sensitive to inflammation, which may accelerate recession that was already underway.
How to Recognize Recession Early
The earliest sign is often tooth sensitivity, particularly a sharp reaction to cold drinks, cold air, or sweet foods. This happens because the root surface, which lacks the protective enamel that covers the crown of your tooth, becomes exposed as gums pull back. You might also notice that one or more teeth appear longer than they used to, or that you can feel a notch or step where the gum meets the tooth.
Visible changes in your gumline are sometimes easier to spot when you compare sides of your mouth. Recession rarely happens symmetrically. If one canine looks longer than the other, or if you can see a yellowish root surface peeking out below the normal pink gum on a specific tooth, that’s recession. Redness, swelling, or bleeding when you brush points more toward active gum disease as the underlying cause.
Treatment Depends on the Severity
Mild recession, where the gums have pulled back slightly but you’re not experiencing significant sensitivity or bone loss, is often managed with monitoring and habit changes. Your dentist may recommend a professional cleaning to remove tartar below the gumline (a procedure called scaling and root planing), a switch to a softer toothbrush, or a night guard if bruxism is a factor. The goal at this stage is to stop the progression.
More advanced recession typically calls for gum graft surgery. A periodontist takes a small piece of tissue, usually from the roof of your mouth or from a donor source, and attaches it over the exposed root. This rebuilds the protective barrier, reduces sensitivity, and helps prevent further bone loss. Recovery generally takes one to two weeks for initial healing, with the grafted tissue continuing to mature over several months. Your periodontist will decide whether grafting is necessary based on how much tissue has been lost, how quickly it’s progressing, and whether the underlying cause has been addressed.
Daily Habits That Protect Your Gums
Brushing twice a day with a soft-bristled brush and gentle pressure is the foundation, but it’s not enough on its own. A regular toothbrush can’t reach the tight spaces between teeth where plaque builds up and triggers the inflammation that leads to recession. Cleaning between your teeth once a day with an interdental brush or floss removes that hidden buildup. Most people need two or three different sizes of interdental brush to fit the varying gaps throughout their mouth. Insert each brush gently without forcing it; if it doesn’t slide in easily, try a smaller size.
Quitting smoking or vaping restores blood flow to gum tissue and dramatically improves your body’s ability to fight oral infections. If you grind your teeth, wearing a night guard consistently prevents the cumulative micro-damage that loosens gum attachment over time. And regular dental visits, ideally every six months, catch recession early when it’s easiest to manage. Gum tissue doesn’t grow back on its own once it’s gone, so the most effective strategy is preventing further loss rather than trying to reverse what’s already happened.