Gums recede when the tissue that hugs your teeth gradually pulls back or wears away, exposing more of the tooth root than you’d normally see. It rarely happens overnight. Most people notice it slowly, sometimes only after a dentist points it out or their teeth start feeling sensitive to cold drinks. The causes range from how you brush your teeth to the genetics you were born with, and understanding which factors are driving your recession is the first step toward slowing or reversing it.
Gum Disease Is the Leading Cause
The most common reason gums recede is periodontal disease, a bacterial infection of the tissues that support your teeth. It starts with plaque, the sticky film of bacteria that builds up along your gum line every day. When plaque isn’t removed through regular brushing and flossing, bacteria and their byproducts work their way beneath the gum line and into the connective tissue underneath. This triggers an inflammatory response: your immune system sends defensive cells to fight the bacteria, but in the process, the collagen fibers that anchor your gums to your teeth get destroyed.
As the inflammation deepens, the gum tissue physically separates from the tooth surface and shifts downward (or upward, on the lower jaw). This creates a pocket between the tooth and gum where even more bacteria can collect. Over months and years, the cycle of infection, inflammation, and tissue destruction causes progressive recession and can eventually damage the bone supporting your teeth. The early stage, gingivitis, is reversible. Once it progresses to periodontitis with actual attachment loss, the damage is harder to undo without professional treatment.
Brushing Too Hard Wears Tissue Away
Aggressive brushing is one of the most preventable causes of recession. Using a hard-bristled toothbrush or scrubbing with too much force physically abrades the gum tissue over time, especially along the outer surfaces of your teeth where the brush makes the most contact. This type of recession often shows up on just one or two teeth rather than across your whole mouth, and it tends to affect the side opposite your dominant hand (where you naturally apply more pressure).
The American Dental Association recommends using a soft-bristled toothbrush, holding it at a 45-degree angle against the gum line, and moving it gently in short back-and-forth strokes. The goal is to sweep plaque away from the gum margin without grinding into the tissue itself. If the bristles on your toothbrush splay outward within a few weeks, you’re pressing too hard.
Teeth Grinding Creates Constant Stress
Clenching or grinding your teeth, a habit called bruxism, puts enormous mechanical stress on your gums and the structures holding your teeth in place. The forces generated during grinding can exceed ten times the pressure of normal chewing. That pressure strains not just your teeth and jaw muscles but also the periodontal ligament, the thin band of tissue that anchors each tooth to its surrounding bone.
Over time, the repeated stress causes micro-injuries in both the gum tissue and the supporting bone. These small traumas accumulate faster than your body can repair them, weakening the structures that hold gums firmly against the teeth and gradually pulling the tissue away from the root surface. Many people grind at night without realizing it, so unexplained recession (especially on teeth that are otherwise healthy and well-brushed) can be a clue that bruxism is involved.
Your Gum Thickness Matters
Not everyone’s gums are built the same way. Some people naturally have thicker gum tissue, while others have a thinner type. Research published in the Saudi Journal of Oral and Dental Research found a statistically significant link between thin gum tissue and higher rates of recession. If your gums are naturally thin, there’s simply less tissue acting as a buffer against inflammation, brushing force, or mechanical stress. A dentist or periodontist can assess your tissue type during a routine exam.
Genetics also influence how your teeth are positioned within the jawbone. Teeth that sit slightly forward or are crowded can have thinner bone and tissue on the outer surface, making those spots more vulnerable. Orthodontic movement, whether from braces or aligners, can sometimes contribute if teeth are pushed outside the natural arch of bone support.
Smoking Slows Healing and Speeds Damage
Tobacco use is a major risk factor. According to the CDC, smoking weakens your immune system, making it harder for your body to fight off gum infections in the first place. Once gum damage occurs, smoking also impairs your gums’ ability to heal. The combination means that smokers are more likely to develop periodontal disease and less likely to recover from it. This creates a cycle where tissue loss accelerates and treatment becomes less effective. Quitting smoking measurably improves gum health over time, even in people who already have some recession.
How to Spot Recession Early
The most obvious sign is that your teeth look longer than they used to. You may notice more of the yellowish root surface becoming visible below (or above) the pink gum line. But recession doesn’t always announce itself visually first. Many people notice sensitivity before they see any change. Cold drinks, hot food, sweet flavors, or even the pressure of brushing can trigger a sharp, fleeting sting on teeth where the root has become exposed. That’s because the root surface lacks the thick enamel that protects the crown of your tooth, so temperature and touch reach the nerve more easily.
Other early warning signs include a notch or groove you can feel with your fingernail at the gum line, discomfort near the base of a tooth, or increased sensitivity during dental cleanings. If any of these sound familiar, recession has likely already started.
Treatments That Restore Lost Tissue
Mild recession may not need surgical treatment. Addressing the underlying cause, switching to a softer toothbrush, treating gum disease, or wearing a night guard for grinding, can sometimes stop the process before it becomes a functional problem. Your dentist may apply a bonding material or recommend a desensitizing treatment for exposed roots.
When recession is more advanced, surgical options can cover exposed roots and rebuild lost tissue. The traditional approach is a connective tissue graft: a small piece of tissue is taken from the roof of your mouth and sutured over the recession site, then covered with a flap of your existing gum tissue. This method has decades of evidence behind it, but it does involve a second surgical site on your palate, which adds to post-operative soreness.
A newer alternative, the pinhole surgical technique, avoids that second wound entirely. Instead of transplanting tissue from the palate, the periodontist makes a tiny pinhole in the gum near the affected tooth, loosens the existing tissue through that opening, and repositions it over the exposed root. Small strips of a resorbable membrane are placed underneath to hold the tissue in its new position. Because there’s no palate incision, patients typically experience less pain and a faster recovery. Both techniques are evaluated on the same benchmarks: the percentage of root that gets covered, whether complete coverage is achieved, and how well the tissue heals over follow-up periods that can extend to two years.
Preventing Further Recession
The single most effective thing you can do is keep plaque under control without damaging your gums in the process. That means brushing twice a day with a soft-bristled brush using gentle pressure, flossing daily to reach the areas between teeth where plaque hides, and getting professional cleanings on the schedule your dentist recommends. If you smoke, stopping removes one of the biggest obstacles to gum healing.
If you grind your teeth, a custom night guard from your dentist can absorb the excess force and protect both your teeth and gum tissue while you sleep. Misaligned teeth that create uneven biting pressure may benefit from orthodontic correction, which redistributes forces more evenly across the arch. And if you notice any of the early signs of recession, catching it sooner gives you more options and better outcomes than waiting until the roots are fully exposed.