Gum loss, commonly called gum recession, looks like your teeth are getting longer. The pink tissue that normally hugs the base of each tooth gradually pulls back or wears away, exposing more of the tooth surface and sometimes the root underneath. It often happens so slowly that you don’t notice until the changes become pronounced or you start feeling sensitivity in certain teeth.
Early Visual Signs
The first thing most people notice is that one or more teeth appear longer than their neighbors. This isn’t because the tooth has grown. The gum tissue has moved downward (on upper teeth) or upward (on lower teeth), revealing tooth structure that was previously covered. In the earliest stages, the change can be subtle enough that you only spot it by comparing one side of your mouth to the other, or by looking at old photos.
Another early sign is a small notch or ledge you can feel with your fingernail right where the tooth meets the gumline. This is exposed root surface, which has a slightly different texture than the enamel-covered crown of the tooth. The root surface is softer and often yellower than the rest of the tooth, so you may notice a color change at the gumline before you notice the shape change.
Healthy gums are firm, pale pink, and scalloped neatly around each tooth like a collar. When recession begins, that scalloped edge becomes uneven. One tooth may have a visibly lower gumline than the teeth beside it, creating an asymmetrical appearance. The gum tissue in the affected area may also look thinner or slightly translucent compared to surrounding tissue.
What Moderate to Advanced Recession Looks Like
As gum loss progresses, the visual changes become harder to miss. The exposed root creates a distinct two-tone appearance on the tooth: white or off-white enamel on top, and a darker yellow or brownish root surface below. This color boundary marks where the original gumline used to be. Roots lack the protective enamel coating that covers the crown, so they’re more vulnerable to decay and staining, which can make the contrast even more obvious over time.
In moderate recession, you may see dark triangles forming between your teeth near the gumline. These are called “black triangles” and appear when the small pointed piece of gum tissue between two teeth (the papilla) shrinks or disappears. Healthy gums fill the entire space between teeth. When that tissue recedes, the gaps become visible, and food tends to get caught in them.
Advanced gum loss can make teeth look dramatically elongated, sometimes appearing nearly twice their normal visible length. At this stage, the roots may be exposed well below where the enamel ends, and you might see the slight flare where roots begin to separate on multi-rooted teeth like molars. Teeth can also start to look like they’re spacing apart or shifting position, because the supporting bone underneath the gum tissue is often receding as well.
Where It Shows Up First
Gum recession doesn’t usually affect all teeth equally. It tends to show up first on the canines and premolars, the teeth along the corners and sides of your smile. These teeth are common sites because they sit at the curve of the dental arch, where aggressive brushing tends to hit hardest. The lower front teeth are another frequent starting point, especially if they’re slightly crowded or rotated, since the bone and gum tissue on the outer surface is naturally thinner there.
Recession on the tongue side of your teeth is harder to spot visually but just as common, particularly around the lower front teeth. You’re more likely to detect this by feel, running your tongue along the inner gumline and noticing a ridge or gap where tissue used to be.
Symptoms That Accompany the Visual Changes
What you see usually comes with what you feel. Tooth sensitivity is one of the most common companion symptoms, particularly a sharp zing when you drink something cold, eat something sweet, or breathe in cold air. This happens because the exposed root contains tiny tubes that lead directly toward the nerve inside the tooth. Without gum tissue or enamel covering them, temperature and sugar trigger pain signals more easily.
The gums themselves may look red or swollen along the receding edge, especially if the recession is driven by gum disease rather than mechanical wear. You might notice bleeding when you brush or floss around affected areas. In some cases, the gum tissue appears pale and thin rather than inflamed, which is more typical of recession caused by brushing too hard or having naturally thin tissue.
If the recession has progressed enough to affect the bone supporting the tooth, you may notice the tooth feels slightly loose or shifts when you press on it with your finger. This is a sign of significant structural loss and not just a surface-level gum change.
Common Causes of Gum Recession
Periodontal disease is the leading cause. Bacterial buildup below the gumline triggers a chronic inflammatory response that gradually destroys gum tissue and the bone beneath it. This type of recession tends to affect multiple teeth and is often accompanied by persistent bad breath, bleeding gums, and pockets of space forming between the tooth and gum.
Brushing too aggressively with a hard-bristled toothbrush is the second most common cause. This type of recession typically shows a clean, even pattern without much inflammation. It often affects the side of the mouth opposite your dominant hand (right-handed people tend to brush the left side harder) and is more common on the outer-facing surfaces of teeth.
Other contributing factors include grinding or clenching your teeth, which places excessive force on the gum and bone; tobacco use, which reduces blood flow to gum tissue and accelerates breakdown; misaligned teeth that create uneven pressure; and genetics. Some people simply inherit thinner gum tissue that’s more prone to recession regardless of how well they care for their teeth. Roughly 30% of the population may be genetically predisposed to gum disease even with good oral hygiene habits.
How Gum Loss Differs From Normal Aging
A small amount of gum recession over decades is relatively common in adults, which is where the expression “long in the tooth” comes from. But significant or rapid recession is not a normal part of aging. If you can visibly see more root surface than you could a year or two ago, or if the change is happening on one side of your mouth faster than the other, that points to an active process rather than gradual wear.
The key distinction is the rate and pattern of change. Age-related changes are slow, symmetrical, and usually measured in fractions of a millimeter per year. Recession driven by disease or mechanical damage tends to be faster, uneven, and concentrated on specific teeth. Tracking this yourself is difficult since the changes are small, but paying attention to sensitivity patterns and how your teeth look in photos over time gives you useful reference points.
What Happens if It Continues
Gum tissue does not grow back on its own. Once recession has occurred, the exposed root surface stays exposed unless it’s treated. Mild recession (1 to 2 millimeters of exposure) is extremely common and often doesn’t require intervention beyond adjusting your brushing technique and monitoring for progression.
More significant recession can be addressed with gum grafting procedures, where tissue is relocated from the roof of your mouth or a tissue bank to cover the exposed root. This restores both the appearance and the protective barrier. Newer techniques using collagen-based materials or guided tissue regeneration can sometimes stimulate partial regrowth of lost attachment.
Left untreated, progressive gum loss eventually compromises the tooth’s stability. The root becomes increasingly vulnerable to decay, and the bone loss that accompanies advanced gum disease can reach a point where the tooth can no longer be saved. Catching recession early, when you first notice a tooth looking slightly longer or feeling a ridge at the gumline, gives you the widest range of options for stopping it from getting worse.