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 extremely common: over 42% of American adults aged 30 and older have some form of periodontal disease, and that number climbs to nearly 60% for adults 65 and older. The causes range from brushing too hard to bacterial infections to genetics, and often several factors overlap at once.
Gum Disease Is the Leading Cause
The most common reason gums recede is periodontal disease, a bacterial infection that destroys the tissue and bone holding your teeth in place. It starts when plaque, a sticky film of bacteria, builds up along and below the gumline. As bacteria infiltrate the gum tissue, they trigger an inflammatory response that breaks down collagen fibers in the connective tissue anchoring your gums to your teeth. Over time, this causes the attachment point between gum and tooth to shift downward, creating deeper pockets between the tooth and gum where even more bacteria collect.
This cycle is self-reinforcing. Deeper pockets are harder to clean, which accelerates bacterial buildup, which drives further tissue destruction. The process can be painless for years, which is why many people don’t realize they have it until the recession is already visible. Early-stage gum disease (gingivitis) is reversible with better hygiene, but once the connective tissue and bone are lost, the damage is permanent without professional treatment.
You Might Be Brushing Too Hard
Aggressive brushing is one of the most overlooked causes of recession, and it can happen even in mouths free of gum disease. Research shows that brushing forces above 3 newtons (roughly the weight of pressing a kitchen sponge firmly against a surface) are associated with both gum recession and enamel wear. In studies, people with severe recession applied an average force of 3.8 newtons, while those with no recession brushed at around 2.1 newtons. The average person brushes at about 2.3 newtons, which is close to the safe range but easy to exceed without realizing it.
The horizontal scrub technique, where you move the brush back and forth in a sawing motion, is especially damaging. That repetitive side-to-side movement over the gumline gradually pushes the tissue down. Bristle stiffness matters too. Hard-bristled brushes cause more surface loss than soft bristles at the same force level. The American Dental Association recommends soft-bristled brushes for this reason. Soft bristles are flexible enough to reach more surface area while being gentle on gums, and they remove plaque just as effectively.
Your toothpaste also plays a role. Toothpaste abrasiveness is measured on an RDA (Relative Dentin Abrasivity) scale. Products rated 0 to 70 are minimally abrasive, 71 to 100 moderately so, and anything above 150 is considered harmful. Whitening toothpastes tend to score higher on this scale. Pairing a high-abrasivity toothpaste with a medium or hard brush is a recipe for gum and enamel damage over time.
Smoking Starves Your Gums of Blood
Nicotine constricts blood vessels throughout the body, and the gums are no exception. In smokers, the density of blood vessels in gum tissue is significantly reduced compared to nonsmokers: roughly 37 vessels per microscopic field versus 49 in nonsmokers. That’s about 25% fewer blood vessels delivering oxygen and nutrients to the tissue that supports your teeth.
Beyond reduced circulation, nicotine stimulates the sympathetic nervous system and reduces saliva production. Less saliva means plaque accumulates faster on both teeth and soft tissue. The combination of impaired blood flow, reduced healing capacity, and increased plaque buildup makes smokers far more vulnerable to recession and makes treatment less effective when they do seek help.
Orthodontic Treatment and Tooth Position
Braces and aligners move teeth by applying controlled pressure to the bone and gums. When that pressure is excessive or teeth are moved too far, it can push them outside the supporting bone structure. This is particularly common with lower front teeth, where the bone is naturally thin. Once a tooth sits outside its bone envelope, the overlying gum has nothing to support it and begins to recede.
This doesn’t mean orthodontic treatment is inherently risky. The problem typically arises from moving teeth too quickly or pushing them into positions the bone can’t accommodate. If you’re noticing recession during or after orthodontic work, the alignment itself may be a contributing factor.
Other Contributing Factors
- Genetics: Some people inherit thinner gum tissue or a narrower band of tissue around their teeth, making them more prone to recession regardless of hygiene habits.
- Teeth grinding (bruxism): Clenching or grinding places excessive lateral force on teeth, which can gradually wear down both bone and gum tissue.
- Hormonal changes: Fluctuations during puberty, pregnancy, and menopause can make gum tissue more sensitive and vulnerable to recession.
- Misaligned bite: When teeth don’t come together evenly, certain teeth absorb disproportionate force, accelerating tissue loss in those areas.
Receding Gums Don’t Grow Back on Their Own
This is the part most people don’t want to hear: once gum tissue is lost, it does not regenerate naturally. Good oral hygiene can stop further recession, but it cannot reverse what’s already happened. The exposed root surface will remain exposed unless you pursue professional treatment.
For mild recession, stopping the cause (switching to a soft brush, treating gum disease, quitting smoking) may be all that’s needed. The tissue won’t return, but preventing further loss protects the tooth from sensitivity, decay, and eventual loosening.
What Treatment Looks Like
When recession is significant enough to cause sensitivity, cosmetic concerns, or risk to the tooth, surgical options can restore coverage over exposed roots.
Connective Tissue Graft
This is the traditional approach and still the most widely used. A small piece of tissue is taken from the roof of your mouth and stitched over the exposed root. Because the graft receives blood supply from both the tissue bed beneath it and the flap of gum placed over it, it integrates well and produces a natural color match. The graft also thickens the gum tissue in the area, which provides long-term protection. The trade-off is a second surgical site on your palate, which adds to recovery discomfort.
Pinhole Surgical Technique
A newer, minimally invasive alternative involves making a tiny hole in the gum tissue above the affected area, then gently loosening and repositioning the existing tissue downward to cover the exposed root. Small collagen strips are tucked underneath to hold everything in place while it heals. There’s no tissue harvested from the palate and no sutures at the gumline, which typically means less pain and faster recovery. The downside is that it doesn’t add new tissue thickness the way a graft does.
Both approaches can achieve full root coverage in milder cases (where the bone between teeth is still intact). In more advanced recession where bone has been lost between the teeth, complete coverage becomes harder to achieve regardless of the technique used.
How to Prevent Further Recession
If your gums are already receding, the priority shifts to protecting what you have left. Switch to a soft-bristled toothbrush and use gentle, circular strokes rather than a back-and-forth scrubbing motion. Keep your brushing time around two minutes, and resist the urge to press harder for a “deeper clean.” Choose a toothpaste with an RDA value under 70 if you can find it listed (many brands don’t advertise this, but your dentist can recommend one).
Floss daily. Bacterial plaque between teeth is the primary driver of the gum disease that causes most recession, and no amount of brushing reaches those surfaces. If you smoke, quitting will improve blood flow to your gums and slow the progression of any existing periodontal disease. If you grind your teeth at night, a custom mouthguard can absorb the forces that would otherwise be transferred to your gums and bone.
Regular dental cleanings, typically every six months, remove the hardened plaque (calculus) that forms below the gumline and can’t be reached at home. For people who already have gum disease, deeper cleanings at shorter intervals may be necessary to keep bacterial levels under control and halt the cycle of inflammation and tissue loss.