Gum recession happens when the gum tissue surrounding your teeth pulls back or wears away, exposing more of the tooth or its root. It’s one of the most common dental conditions, and it rarely has a single cause. Most cases result from a combination of factors: the thickness of your gum tissue, how you brush, whether you smoke, hormonal shifts, and even jewelry in your mouth.
Your Gum Tissue Type Matters More Than You Think
Not everyone’s gums are built the same way. Gum tissue comes in two basic types: thick and thin. Thick tissue is dense, resilient, and better able to withstand irritation, inflammation, and minor trauma. Thin tissue is almost translucent, with a narrow band of attached gum and very little underlying bone. This thin type is significantly more prone to recession because it simply can’t absorb the same level of stress.
Your gum type is largely determined by the shape of your teeth. People with narrow, tapered teeth tend to have thinner gum tissue, while those with wider, more square-shaped teeth tend to have thicker, more protective gums. This is one reason two people with identical brushing habits can have very different outcomes: the person with thin tissue may develop noticeable recession while the other shows none at all. You can’t change your tissue type, but knowing you have thin gums can help you and your dentist take a more cautious approach to prevention.
Aggressive Brushing and Hard Bristles
Brushing too hard is one of the most common and most preventable causes of gum recession. When you scrub your teeth with excessive force, especially with a hard-bristled toothbrush, you physically wear away the gum tissue over time. This type of recession typically shows up on the outer (cheek-side) surfaces of the teeth, and it often appears on the side of the mouth opposite your dominant hand, where you tend to apply more pressure.
The damage is gradual. You won’t notice it after a single brushing session, but months or years of forceful scrubbing can push gums permanently away from the tooth surface. Switching to a soft-bristled brush and using gentle, circular motions instead of a back-and-forth sawing action can stop the progression.
Gum Disease Is the Leading Cause
Periodontal disease, the bacterial infection of gum tissue and the bone supporting your teeth, is the most significant driver of gum recession. It starts with plaque buildup along the gumline. If plaque isn’t removed, it hardens into tarite (calculus), which irritates and inflames the gums. Over time, this chronic inflammation destroys the attachment between the gum and the tooth, and the tissue pulls away.
In the early stage (gingivitis), gums become red, swollen, and bleed easily, but the damage is still reversible. Once the infection progresses to periodontitis, the deeper supporting structures begin to break down, pockets form between the teeth and gums, and recession becomes more pronounced and harder to reverse. This is where the most severe recession occurs, often affecting not just the outer surface of the tooth but also the tissue between teeth.
Smoking Nearly Doubles Recession Risk
Tobacco use has a strong, well-documented link to gum recession. In one cross-sectional study comparing smokers to non-smokers, 25% of smokers had measurable gum recession compared to 13% of non-smokers. That’s nearly double the rate, and the difference was statistically significant.
Smoking damages gums through several mechanisms. It reduces blood flow to the gum tissue, which slows healing and makes the tissue more vulnerable to infection. It also suppresses immune responses in the mouth, allowing harmful bacteria to thrive. One of the tricky aspects of smoking-related gum disease is that it can mask early warning signs: smokers often experience less bleeding from their gums than non-smokers, even when significant damage is already underway. This means the disease can progress further before it’s caught.
Hormonal Changes in Women
Fluctuations in estrogen and progesterone can make gum tissue more reactive to even small amounts of plaque. This doesn’t cause recession directly, but it creates conditions where recession becomes more likely.
During puberty, rising hormone levels can trigger swollen, red, bleeding gums even with normal oral hygiene. In pregnancy, roughly 57% of women experience pregnancy-related gingivitis, and for some, the inflammation can accelerate deeper tissue and bone loss around the teeth. After menopause, reduced salivary flow becomes a concern. Dry mouth allows plaque to accumulate more easily, which can lead to both cavities and gum inflammation. Each of these hormonal windows represents a period of heightened vulnerability for gum tissue.
Lip and Tongue Piercings
Oral piercings are a surprisingly potent cause of localized gum recession. The metal jewelry repeatedly rubs against the gum tissue on the inside of the lip or behind the lower front teeth, gradually wearing it away. A systematic review of the available evidence found that 50% of people with lip piercings and 44% of people with tongue piercings developed gum recession. People with lip piercings were about four times more likely to develop recession than those without piercings, and tongue piercings nearly tripled the risk.
The recession from piercings tends to be concentrated on the teeth closest to the jewelry, often the lower front teeth. Unlike some other causes, this one is entirely within your control. Removing the piercing stops the mechanical damage, though tissue that’s already been lost won’t grow back on its own.
Teeth Grinding and Bite Problems
Teeth grinding (bruxism) has long been suspected of contributing to gum recession by placing excessive force on teeth and the surrounding structures. The evidence, however, is more nuanced than most people assume. Animal studies that artificially created bite interference found that the abnormal forces did cause bone loss around the affected teeth after just 14 days, but the gum tissue itself did not measurably recede during that time.
What this suggests is that grinding and bite problems may contribute to recession indirectly. By accelerating bone loss, they reduce the foundation that supports the gum tissue. Over longer periods, this bone loss can leave the gums without enough underlying structure to maintain their position, eventually leading to visible recession. Grinding also tends to coexist with other risk factors like stress, clenching-related wear on teeth, and sometimes neglected oral care, making it hard to isolate its role.
If you grind your teeth at night, a custom night guard can protect both your teeth and the bone supporting them.
Misaligned Teeth and Orthodontic Treatment
When teeth are crowded or positioned outside their normal alignment, the bone and gum tissue covering them can be thinner than usual. A tooth that sits too far forward in the arch, for instance, may have minimal bone on its outer surface, leaving the overlying gum with little support. This makes recession more likely, sometimes even without any other contributing factor.
Orthodontic treatment can help by moving teeth into better alignment, but the process itself carries some risk. Moving teeth too aggressively, particularly pushing them outside the bone envelope, can thin the tissue further and trigger recession during or after treatment. This is why orthodontists increasingly use cone-beam CT scans to assess bone thickness before treatment and plan tooth movements that stay within safe boundaries.
Other Contributing Factors
- Age: Recession becomes more prevalent with age. Some degree of gum tissue loss is nearly universal in older adults, partly due to cumulative wear and partly due to natural changes in tissue quality.
- Genetics: Family history plays a role. Some people inherit thinner tissue, weaker immune responses to oral bacteria, or jaw structures that predispose them to recession regardless of their habits.
- Frenum pull: A frenum is the small fold of tissue connecting your lip or cheek to the gum. If it attaches too close to the gumline, it can pull the tissue away from the tooth during normal lip movement, gradually causing localized recession.
- Partial dentures and ill-fitting dental work: Clasps from removable dentures or rough edges on crowns and fillings can irritate the gum tissue at specific points, leading to recession in those areas over time.
In most people, recession results from two or three of these factors acting together. Someone with naturally thin gum tissue who also brushes aggressively and smokes, for example, faces a much higher combined risk than any single factor would produce on its own. Understanding which causes apply to you is the first step toward slowing or stopping further tissue loss.