The most obvious sign of gum recession is visible tooth root exposure, where the gum tissue has pulled back to reveal parts of a tooth that used to be covered. But recession often starts gradually, and early stages can be easy to miss if you don’t know what to look for. Here’s how to check yourself and understand what the signs mean.
What You Can See in a Mirror
Stand in front of a well-lit mirror, pull your lip back gently, and look at where your gums meet each tooth. Healthy gums sit snugly around the base of the tooth in a smooth, scalloped line. With recession, that line drops lower on one or more teeth, making the affected teeth look longer than their neighbors. You may notice a difference in color partway up the tooth: the exposed root surface is typically a darker yellow compared to the whiter enamel above it, because root surfaces don’t have the same protective enamel coating.
Pay attention to the shape of any gum loss. A narrow, V-shaped notch running down from the gum line often shows up on teeth that are absorbing heavy biting forces, like canines or premolars that take the brunt of a misaligned bite. A wider, U-shaped scoop is more common when aggressive brushing or gum inflammation is the cause. With the U-shaped type, the exposed root surface often looks smooth and polished if overbrushing is the culprit, or the surrounding tissue may appear puffy and reddened if plaque buildup and inflammation are driving the problem.
Another visual clue: small dark triangles appearing between your teeth near the gum line. These gaps open up when the tiny pointed piece of gum tissue (called a papilla) that normally fills the space between teeth starts to shrink. Old photos of your smile can be surprisingly useful here. Comparing how your gum line looks now versus a few years ago makes slow changes much easier to spot.
What You Can Feel
Sensitivity is often the first thing people notice before they ever look closely at their gums. When root surfaces become exposed, they lose the insulation that enamel provides. The root contains microscopic channels that lead toward the tooth’s nerve, so cold drinks, hot food, sweet or acidic items, and even a blast of cold air can trigger a sharp, fleeting sting. If sensitivity is new and concentrated on specific teeth rather than spread across your whole mouth, recession is a likely explanation.
Run your fingernail or tongue along the front surface of each tooth near the gum line. A healthy tooth feels smooth and continuous. A receding tooth often has a detectable ridge or step where the enamel ends and the softer root begins. You might also feel a small groove or notch worn into the root surface just below the gum line, caused by the combination of exposed root and continued brushing pressure. Some people describe a “catch” when they run a fingernail across it.
Tenderness or soreness along the gum margin is another signal, especially if it shows up when you brush or floss a specific area. Gums that bleed easily in one spot can indicate inflammation that’s contributing to tissue loss, even if visible recession hasn’t become dramatic yet.
Early Signs That Are Easy to Miss
Recession doesn’t announce itself suddenly. In its earliest stages, the gum may shift only a fraction of a millimeter, not enough to see with the naked eye. Research on clinical measurements confirms that small shifts in the gum margin can go undetected until the tissue drops below a specific anatomical landmark on the tooth. That means you can have the beginnings of recession without any visible root exposure yet.
What you might notice instead are indirect hints. A tooth that “just feels different” when you bite down, a spot where food gets stuck that never used to trap anything, or a single tooth that has become sensitive to cold when it wasn’t before. These subtle changes are worth paying attention to because they often precede the more obvious visual signs by months or even years.
What a Mirror Can’t Tell You
Home checks are useful for spotting moderate to advanced recession, but they have real limitations. In a dental office, recession is measured with a thin probe placed at the gum line, and even that method has variability depending on the angle of the probe and the clinician’s technique. The key limitation of checking at home is that early gum loss can happen beneath the visible gum margin, where the tissue appears to be in the right place but has actually detached from the tooth underneath. You can’t detect that with a mirror.
Professional exams also assess the bone level beneath the gums using X-rays, which matters because bone loss and gum recession frequently go together. How much bone support remains around a tooth determines how serious the recession is and what treatment options are realistic. Dentists classify recession into different types based on whether the bone and tissue between teeth is still intact. When the tissue between teeth is healthy and only the outer gum has receded, the situation is more straightforward to treat. When bone loss extends between teeth as well, the picture is more complex.
Common Causes to Consider
If you suspect recession, it helps to think about what might be driving it, because the cause influences whether the problem will keep progressing. The most common contributors are:
- Aggressive brushing: Using a hard-bristled brush or pressing too firmly wears away gum tissue over time, especially on the outer surfaces of prominent teeth. The resulting recession typically has that smooth, polished root surface.
- Gum disease: Chronic inflammation from plaque and tartar buildup breaks down the attachment between gum and tooth. This type of recession is often accompanied by redness, puffiness, or bleeding.
- Clenching or grinding: Excessive biting forces can stress the bone and tissue around teeth, leading to V-shaped notches at the gum line. You may also notice wear on the chewing surfaces of those same teeth.
- Tooth position: Teeth that sit slightly outside the arch, tilted, or crowded are more vulnerable because the bone covering them is thinner to begin with.
- Lip or cheek tissue pulls: A tight band of tissue connecting the lip or cheek to the gum near a tooth can tug the gum downward over time, especially during talking or chewing.
Why It Matters If You Ignore It
Recession that goes unaddressed creates a compounding problem. The exposed root surface is softer than enamel and significantly more vulnerable to decay. Research has found that gingival recession is the single most reliable predictor of root cavities, and the risk climbs with age, particularly after 40. Root cavities are also harder to treat than regular cavities because of their location and the thinner structure of the root.
Beyond decay, continued recession means continued loss of the support structure holding your tooth in place. Over time, teeth can become loose, and the cosmetic effects become more pronounced. The good news is that recession caught early, when the tissue between teeth is still intact, responds well to treatment. Gum grafting procedures have high success rates for covering exposed roots when the surrounding bone is healthy. Even when grafting isn’t needed, identifying and eliminating the cause (switching to a softer brush, treating gum disease, wearing a night guard for grinding) can stop the progression.
A simple self-check takes less than a minute. Pull your lips back, look at each tooth in good light, and compare what you see to how things looked a year or two ago. If teeth look longer, roots look exposed, or sensitivity has crept into specific spots, those are the signals that recession is underway.