Gum erosion, more precisely called gum recession, is the gradual loss of gum tissue that exposes the lower portions of your teeth, including the roots. About 81% of adults have at least some degree of recession (1 mm or more), and roughly half have moderate recession of 3 mm or more. It’s one of the most common dental conditions, yet many people don’t notice it until sensitivity or visible changes become hard to ignore.
The term “gum erosion” can cause some confusion because dentists use “erosion” to describe a separate problem: the chemical wearing away of tooth enamel by acids. Gum recession is about soft tissue pulling back from the tooth. Both can happen at the same time, but they have different causes and different treatments. This article focuses on the gum tissue side of the equation.
How Gum Recession Happens
Your gums are anchored to the underlying bone and connective tissue that surround each tooth. When that support structure breaks down, the gum margin migrates downward (on upper teeth) or upward (on lower teeth), revealing parts of the tooth that were never meant to be exposed. The root surface lacks the hard enamel coating that protects the crown of your tooth, so once it’s uncovered, it’s vulnerable to decay, sensitivity, and further damage.
The breakdown can happen in two main ways. In the first, chronic low-level physical trauma, like years of aggressive brushing, gradually wears the gum tissue thinner until it retreats. In the second, bacterial infection triggers an inflammatory response that digests the connective tissue fibers and eats away at the bone supporting the gums. Once enough bone is lost, the gum tissue simply has nothing left to cling to. These two pathways often overlap, and in many mouths, both are happening simultaneously.
The Most Common Causes
Brushing too hard is one of the leading drivers. Scrubbing back and forth with stiff bristles or pressing too firmly day after day physically wounds the delicate gum margin. Over years, that repeated trauma adds up. These cases often show up alongside worn, notched areas on the tooth surface near the gumline, caused by the same abrasive force.
Periodontal disease (gum disease) is the other major culprit. Plaque and tartar buildup harbor bacteria that inflame the gums. Left untreated, the inflammation spreads deeper, breaking down bone and connective tissue. The gums shrink as the disease progresses, and treatment itself, including deep cleanings and surgeries, can also result in some tissue loss as swelling resolves and healing reshapes the gumline.
Other contributing factors include:
- Genetics: Some people are born with naturally thinner gum tissue, making recession more likely regardless of hygiene habits.
- Misaligned teeth: Teeth that sit outside their normal position put uneven pressure on the surrounding bone and gums.
- Trauma or injury: A blow to the mouth, lip piercings that rub the gums, or clenching and grinding can all accelerate tissue loss.
What It Looks and Feels Like
Early recession is easy to miss. You might notice that one tooth looks slightly longer than its neighbors, or that a yellowish strip has appeared near the gumline where the root surface is now showing. The gum tissue itself may look thin or pulled tight rather than full and scalloped.
Sensitivity is often the first symptom that gets people’s attention. Exposed root surfaces react sharply to hot, cold, sweet, or acidic foods and drinks. You might also feel a notch or ridge when you run your fingernail along the base of a tooth. As recession advances, teeth can start to feel loose, and the spaces between teeth near the gumline can widen, trapping food more easily. In severe cases (5 mm or more of recession, which affects about 16% of adults), there’s a real risk of tooth loss.
Non-Surgical Treatment
When recession is caught early and gum disease is the underlying cause, a deep cleaning called scaling and root planing is typically the first step. The procedure removes plaque and tartar from below the gumline, then smooths the root surfaces so bacteria have a harder time reattaching. This doesn’t regrow lost tissue, but it halts the inflammatory cycle that was driving the recession forward. For many people with mild to moderate gum disease, this treatment combined with improved home care is enough to stabilize the situation and prevent further loss.
Your dentist may also apply a desensitizing agent or bonding material to exposed roots to reduce sensitivity and protect the surface from decay.
Surgical Options for Advanced Recession
When significant root exposure has already occurred, surgery can restore coverage. The most established approach is gum grafting, which comes in a few forms. In a connective tissue graft (the most common type), a small piece of tissue is taken from beneath the roof of your mouth and stitched over the exposed root. Free gingival grafts take tissue directly from the palate surface, while pedicle grafts rotate nearby gum tissue to cover the affected area.
Recovery from traditional grafting takes one to two weeks, during which you’ll need to stick to soft foods and be careful with brushing near the surgical site. Success rates are high, above 90% in most cases.
A newer alternative is the Pinhole Surgical Technique, which skips incisions and stitches entirely. Instead, a tiny hole is made in the gum tissue, and specialized instruments loosen and reposition the existing tissue to slide it over the exposed roots. Collagen is placed underneath to hold everything in place while it heals. The main advantages are faster recovery (often a day or two rather than a week or more), minimal discomfort, and the ability to treat multiple teeth in a single session. Traditional grafting usually addresses only one or two teeth at a time.
Preventing Further Recession
The single most impactful change for many people is switching how they brush. Hard-bristled toothbrushes can directly cause recession, while soft and medium bristles do not damage gum tissue even with frequent brushing. If your oral hygiene needs improvement, medium bristles may be more effective at removing plaque, but for most people a soft-bristled brush is the safer default.
Technique matters as much as the brush itself. Rather than scrubbing side to side, angle the bristles toward the gumline and use short, gentle strokes or small circular motions. Aim for two minutes, twice a day. Electric toothbrushes with pressure sensors can help if you tend to bear down too hard.
Beyond brushing, keeping plaque under control with daily flossing or interdental brushes reduces the bacterial load that triggers inflammatory recession. If you grind your teeth at night, a custom nightguard protects both your gums and enamel from the constant pressure. And regular dental cleanings, typically every six months, catch early signs of recession before they progress to the point where surgery becomes necessary.