Gum recession shows up as a visible shift in the gum line, making one or more teeth look longer than their neighbors. Where healthy gums sit snugly around each tooth, receding gums pull away and expose the root surface below, which is typically yellower and duller than the white enamel crown above it. If you’re looking in the mirror and wondering whether your gums are receding, there are several specific visual and physical signs to check for.
What Healthy Gums Look Like
Knowing what’s normal makes it easier to spot what’s not. Healthy gums are pink or coral in color, though the exact shade varies with skin tone. What matters is consistency: the color should look even across your mouth without patches of redness or deep purple. Healthy gum tissue feels firm when you press it gently with a clean finger, not spongy or puffy, and it fits tightly around each tooth like a collar. You may also notice a subtle stippled texture on the surface, similar to the dimpled skin of an orange. This stippling is a sign of well-attached, healthy tissue.
The First Visual Signs of Recession
Early gum recession is subtle. One of the first things you might notice is that a tooth appears slightly longer than the teeth next to it. What’s actually happening is that the gum margin has crept downward (on upper teeth) or upward (on lower teeth), revealing a part of the tooth that was previously hidden. At this stage, the exposed area may only be a millimeter or so. Dentists measure recession with a small probe, rounding up so that even minimal root exposure registers as 1 mm.
Look closely at the area near the gum line. You may see a distinct color change partway up the tooth. The crown (the part that’s always been visible) is covered in enamel, which is smooth, shiny, and white. The newly exposed root surface is covered in a thinner material called cementum, which appears darker, more yellow, and slightly rougher in texture. That color boundary marks where the enamel ends and the root begins. In some people, this junction leaves a tiny gap where neither enamel nor cementum fully covers the surface, exposing the layer underneath, which is even more sensitive.
More Advanced Signs
As recession progresses, the changes become harder to miss. The exposed root surface grows larger and may develop a noticeably worn or concave appearance along the gum line. Some teeth develop wedge-shaped or V-shaped notches right at the point where the gum has pulled away. These notches, called abfraction lesions, have sharp, clearly defined edges and tend to appear on the outer-facing surfaces of teeth. They can coexist with recession and make it look more dramatic, though they’re driven partly by biting forces rather than gum disease alone.
Another hallmark of advancing recession is the appearance of dark triangular gaps between teeth. These “black triangles” form when the small pointed piece of gum tissue that normally fills the space between two teeth (the papilla) shrinks or disappears. The result is a visible dark space at the base of the teeth, widening as it extends toward the roots. Black triangles are not the same as a gap between teeth. They appear specifically where teeth are still in contact at the top but the gum tissue between them has receded, creating a triangular opening along the gum line.
In severe cases, you can see the root surface clearly, the tooth may look dramatically elongated, and you might even notice the tooth shifting slightly or feeling loose. The gum tissue itself often looks thin, fragile, and inflamed around the affected area.
Where Recession Shows Up First
Recession doesn’t affect all teeth equally. The lower front teeth are the most commonly affected, accounting for about 43% of recession cases in one epidemiological study. Upper molars come next at around 13%, followed closely by lower premolars at 12%. Recession on the lower front teeth tends to be linked to poor oral hygiene and plaque buildup, while recession on premolars is more often caused by aggressive toothbrushing.
If you’re doing a self-check, start by pulling your lower lip down and looking at your bottom front teeth. Then check the outer surfaces of your upper molars and premolars by pulling your cheek to the side. These are the areas where recession is most likely to appear first.
How Recession Feels
Gum recession isn’t always painful, which is part of why it can go unnoticed. But once enough root surface is exposed, many people develop sensitivity. The exposed root contains thousands of microscopic tubules that lead toward the nerve inside the tooth. When stimulated, these tubules transmit a short, sharp, fast-onset pain that disappears quickly once the trigger is removed. Some people also experience a lingering dull ache afterward.
Cold is the most common and most problematic trigger. Cold drinks, cold air on a windy day, even breathing through your mouth in winter can set it off. Sweet or acidic foods and drinks can trigger the same response, as can touching the exposed area with a toothbrush bristle. If you’ve started flinching when you drink ice water or noticed a zing of pain while brushing near the gum line, exposed roots from recession are a likely explanation.
Recession vs. Other Gum Line Changes
Not every change at the gum line is recession. It’s worth knowing what else can mimic the appearance. Abfraction lesions, as mentioned above, create notches at the gum line that can look like recession but are actually wear in the tooth structure itself. They’re typically wedge-shaped with distinct angular edges, while pure recession shows a smooth, gradual pull-back of the gum without a notch carved into the tooth. The two often appear together, though, which can make self-diagnosis tricky.
Gum inflammation (gingivitis) can also change the look of your gum line. Swollen, puffy gums may temporarily sit higher on the tooth, masking early recession. When the inflammation resolves, perhaps after a dental cleaning, the gums may appear to “suddenly” recede. In reality, the recession was already there but hidden by the swelling.
How Dentists Classify Severity
Dentists use classification systems to describe how far recession has progressed and what treatment options are realistic. The current standard, known as the Cairo classification, groups recession into three types based on whether the bone and tissue between teeth has also been lost.
- Type 1: The gum has receded on the outer surface of the tooth, but the tissue and bone between neighboring teeth are intact. This is the most treatable form, and surgical repair can often achieve full root coverage.
- Type 2: Recession on the outer surface plus some loss of attachment between the teeth, though no more than what’s lost on the outer side. Results from treatment are less predictable.
- Type 3: The loss of tissue between teeth exceeds the recession on the outer surface. This is the most advanced form and the hardest to correct. Full coverage of the exposed root is unlikely.
In practical terms, Type 1 is what most people notice first: a single tooth looking longer than its neighbors, with the gums between teeth still looking normal. By Type 3, you’re likely seeing black triangles, significant root exposure, and possibly loose teeth. Catching recession early, while it’s still Type 1, gives you the widest range of options for stopping it and repairing the damage.