Gum recession happens when the gum tissue surrounding your teeth pulls back or wears away, exposing the tooth roots underneath. It’s one of the most common dental problems, and it rarely has a single cause. Most cases result from a combination of factors: how you brush, the thickness of your gum tissue, whether you grind your teeth, and how well bacterial plaque is controlled along the gumline.
Brushing Too Hard Is a Leading Cause
Aggressive brushing is one of the most common and most preventable causes of gum recession. The gum tissue along the outer surfaces of your teeth is thin and delicate, and scrubbing it with a hard-bristled toothbrush or too much pressure gradually wears it down. Research on brushing force shows that about 3 newtons of pressure (roughly the weight of a medium apple pressing against your teeth) is the most effective for removing plaque. Above that threshold, the bristles start bending and the risk of tissue damage climbs.
The scrubbing technique most people default to, moving the brush back and forth horizontally, is the method most strongly linked to recession. It tends to affect the outer-facing surfaces of teeth, especially canines and premolars, where the bone and tissue are naturally thinner. Over time, this mechanical abrasion doesn’t just strip away gum tissue. It also exposes the softer root surface beneath the enamel line, which can lead to temperature sensitivity and a sharp pain when eating cold or sweet foods. Switching to a soft-bristled brush and using gentle circular or vertical strokes makes a significant difference.
Gum Disease and Bacterial Buildup
Periodontal disease is the other major driver of recession, and it works through a completely different mechanism than brushing. When bacterial plaque accumulates along and below the gumline, your immune system launches an inflammatory response. In early stages (gingivitis), the gums swell, redden, and bleed easily. If the plaque isn’t removed, it hardens into tarite and the inflammation deepens.
As this progresses, the gums begin pulling away from the teeth, forming pockets between the tooth and the tissue. Bacteria colonize these pockets, and the resulting infection damages not just the gums but the underlying bone. Your body’s own immune response contributes to the destruction: the same inflammatory chemicals meant to fight bacteria also break down the bone and connective fibers anchoring your teeth. This is what makes periodontal disease so destructive. The recession you see on the surface reflects bone loss happening beneath it.
Genetics and Tissue Thickness
Some people are simply more prone to recession because of the gum tissue they inherited. Gum thickness varies significantly from person to person and falls into two general categories. People with thick tissue (2 millimeters or more) have gums that are more resistant to trauma, heal faster after injury, and hold up better over time. People with thin tissue (under 1.5 millimeters) have gums that are more translucent, attach to the tooth over a smaller zone, and are far more vulnerable to recession from brushing, dental procedures, or inflammation.
This isn’t something you can change, but it’s worth knowing. If you’ve noticed recession despite good oral hygiene, thin tissue is a likely contributor. It also affects treatment outcomes: people with thicker gums tend to get better, more predictable results from surgical repair.
Teeth Grinding and Clenching
Bruxism, the habit of grinding or clenching your teeth, can generate forces more than ten times greater than normal chewing. That sustained pressure strains the periodontal ligament (the connective tissue anchoring each tooth to the bone) and traumatizes the surrounding gums. Over time, these repeated micro-injuries accumulate. The gum tissue loses its ability to heal and maintain its position, and the bone beneath it weakens.
Grinding also creates a vicious cycle. As gums recede, pockets form between the teeth and tissue where bacteria collect, increasing the risk of periodontal disease, which causes further recession. Many people grind at night without realizing it. Signs include jaw soreness in the morning, worn-down tooth surfaces, and headaches near the temples. A night guard can absorb much of the damaging force.
Smoking Nearly Doubles Your Risk
Tobacco use is one of the strongest risk factors for the gum disease that drives recession. National survey data from the National Institute of Dental and Craniofacial Research puts this in stark terms: about 62% of current smokers over age 30 have periodontitis, compared to 34% of people who have never smoked. The rate of severe periodontitis is 16.9% among current smokers versus 4.9% among nonsmokers. Even former smokers carry elevated risk, with 45.8% showing signs of periodontal disease, suggesting the damage persists long after quitting.
Smoking impairs blood flow to the gums, which slows healing and makes the tissue less resilient. It also masks early warning signs: smokers often have less gum bleeding than nonsmokers despite having worse disease, because nicotine constricts blood vessels. This can make recession seem to appear suddenly when the underlying damage has been building for years.
Other Contributing Factors
Misaligned teeth create uneven pressure on the gums and bone. A tooth that sits outside the natural arch of the jaw often has thinner bone and tissue on one side, making it a prime spot for recession. Orthodontic treatment can sometimes help by redistributing forces more evenly, though aggressive tooth movement can itself cause temporary tissue changes.
Hormonal shifts also play a role. During pregnancy, puberty, and menopause, rising levels of estrogen and progesterone increase blood flow to the gums, making them more reactive to even small amounts of plaque. This heightened sensitivity can accelerate inflammation and tissue breakdown during those periods. Lip and tongue piercings are another overlooked cause. The metal repeatedly rubs against the gum tissue on the inner surfaces of the teeth, wearing it away over months or years.
How Recession Is Classified
Dentists grade recession severity using a system that predicts how much of the lost tissue can be recovered. In the earliest stage, the recession hasn’t extended beyond the attached gum tissue, and full root coverage through treatment is typically possible. In the next stage, the recession extends further but the bone between adjacent teeth is still intact. As it progresses, bone loss between teeth begins, and only partial coverage can be achieved surgically. In the most advanced stage, the tissue between teeth (the papilla) is completely lost, and full coverage is no longer realistic regardless of the technique used.
This matters because it determines your treatment options. The earlier recession is caught, the more reversible it is.
Non-Surgical Treatment
For mild to moderate cases, especially those driven by gum disease, the first-line treatment is a deep cleaning procedure called scaling and root planing. Scaling removes plaque and hardite from above and below the gumline. Root planing smooths the root surfaces, which helps the gum tissue reattach and makes it harder for bacteria to gain a foothold. This procedure can stop recession from progressing and prevent tooth loss when gum disease is caught early.
Addressing the underlying cause is just as important as the cleaning itself. That might mean switching to a softer toothbrush, getting fitted for a night guard, quitting smoking, or committing to more frequent dental visits. Without removing what’s driving the recession, any treatment is a temporary fix.
Surgical Options for Advanced Recession
When recession has progressed to the point where root surfaces are significantly exposed, surgical repair becomes necessary. The most common approach is a connective tissue graft. A small piece of tissue is taken from under the roof of your mouth, positioned over the exposed root, and stitched into place. Recovery takes one to two weeks, with moderate swelling peaking around days three to five. You’ll need to avoid hard or sticky foods during healing, and each session typically covers one or two teeth.
A newer alternative is the pinhole surgical technique, which skips the tissue harvesting entirely. Instead, a tiny hole is made in the existing gum tissue, and specialized instruments loosen and reposition the gums over the exposed roots. Collagen strips are placed underneath to stabilize the tissue while it heals. Because there are no incisions or stitches, recovery is dramatically faster. Most people return to normal activities within a day or two, with swelling resolving by day three to five. This technique can also treat multiple teeth in a single session.
Both approaches are effective at covering exposed roots and reducing sensitivity. The choice between them often comes down to the extent of recession, your tissue thickness, and what your periodontist recommends for your specific anatomy. People with thicker gum tissue tend to achieve more complete, longer-lasting coverage with either method.