Your gums are most likely separating from your teeth because of gum recession, a condition where the gum tissue gradually pulls back and exposes more of the tooth root than normal. About 42% of U.S. adults over 30 have some form of periodontal (gum) disease, making this one of the most common dental problems. The good news: once you understand what’s driving it, most cases are treatable and further damage is preventable.
What’s Actually Happening Inside Your Gums
Healthy gums fit snugly around each tooth, forming a shallow pocket that’s typically 1 to 3 millimeters deep. When something disrupts that seal, the gum margin starts migrating downward (or upward, on upper teeth), away from the crown and toward the root. This process begins with the loss of the thin layer of bone that supports the gum tissue. As that bone recedes, the soft tissue follows it, because gum tissue naturally tracks the level of the bone underneath. The result is exposed root surface, deeper pockets between gum and tooth, and eventually loose teeth if nothing intervenes.
The pockets themselves matter. A dentist measures them with a thin probe. Pockets of 4 to 5 millimeters indicate moderate disease. Anything 6 millimeters or deeper signals severe periodontitis, meaning significant bone loss is already underway.
The Most Common Causes
Bacterial plaque buildup is the number one cause of gum disease. Plaque is the sticky film that forms on your teeth throughout the day, and it’s packed with bacteria that can infect gum tissue. When plaque isn’t removed regularly, it hardens into tarite (calculus) that sits along and below the gumline, creating a constant source of irritation and infection. Over time, the body’s inflammatory response to those bacteria actually breaks down the bone and tissue holding your teeth in place.
Brushing too hard or using a stiff-bristled toothbrush can also physically push gums away from teeth. This type of recession tends to show up on just one or two teeth, often on the side of the mouth where your dominant hand applies the most pressure. It looks different from infection-driven recession: the gum tissue may appear thin and pulled back rather than red and swollen.
Other factors that contribute:
- Genetics. If your parents or siblings have gum disease, your immune system may respond differently to oral bacteria, making you more vulnerable even with decent hygiene.
- Teeth grinding or clenching. The repetitive force can stress the bone around tooth roots, accelerating the breakdown that leads to recession.
- Misaligned teeth or a bad bite. Uneven pressure distribution concentrates force on certain teeth, thinning the bone on one side.
- Hormonal changes. Pregnancy, puberty, and menopause can all make gum tissue more sensitive to bacterial irritation.
How Smoking and Diabetes Make It Worse
Smoking has a dose-dependent effect on your gums, meaning the more you smoke, the more damage accumulates. Tobacco changes how your immune system responds to the bacteria in plaque, weakening the body’s ability to fight infection while simultaneously masking the warning signs. Smokers often show less visible bleeding and redness than nonsmokers with the same severity of disease, which can make the problem seem less serious than it is.
Diabetes is closely linked as well. People with type 2 diabetes are roughly three times more likely to develop periodontal disease than people without it. Periodontitis is now considered one of the major complications of diabetes, alongside kidney disease, nerve damage, and eye problems. Poorly controlled blood sugar accelerates the breakdown of gum tissue and bone, and the relationship goes both ways: active gum infection makes blood sugar harder to control. In people who both smoke and have diabetes, periodontal disease tends to be significantly more severe than in those with either risk factor alone.
Signs You Shouldn’t Ignore
The earliest and most obvious sign is that your teeth look longer than they used to. You may notice a yellowish or darker area near the gumline where the root surface is becoming exposed. Other things to watch for: increased sensitivity to hot, cold, or sweet foods, especially near the base of a tooth. Bleeding when you brush or floss. A notch you can feel with your fingernail where the gum meets the tooth. Persistent bad breath that doesn’t improve with brushing.
Many people don’t realize anything is wrong until the recession is well established, because the process is gradual and often painless in its early stages. By the time teeth feel loose or shift position, significant bone loss has already occurred.
What Happens If You Don’t Treat It
Exposed root surfaces are softer than enamel and far more vulnerable to decay. Cavities that form on roots are harder to fill and more likely to reach the nerve. As the supporting bone continues to shrink, teeth become mobile. Eventually they may need to be extracted. The deeper the pockets grow, the harder they are to clean at home, which creates a cycle of worsening infection and further tissue loss.
Treatment Options by Severity
If gum disease is caught early and hasn’t damaged the structures below the gumline, a professional cleaning is usually enough. Your dental team removes the plaque and tartar buildup, and with improved home care, the gums can reattach and heal on their own.
When pockets have deepened beyond what a standard cleaning can reach, the next step is a deep cleaning called scaling and root planing. This involves cleaning below the gumline to remove bacteria and hardened deposits, then smoothing the root surfaces so gum tissue can reattach more easily. Research published in the Journal of the American Dental Association confirmed this procedure benefits patients with chronic periodontitis. After the procedure, your dentist will schedule a follow-up to measure pocket depth. If pockets haven’t improved, additional treatment may be necessary.
For more advanced recession where the root is significantly exposed, surgical options can rebuild the gumline. Connective tissue grafting is the traditional approach: a small piece of tissue from the roof of your mouth (or a donor source) is stitched over the exposed root. Recovery takes about two weeks, and the graft strengthens the gum tissue to prevent further recession.
A newer alternative is the pinhole surgical technique, which is less invasive. Instead of cutting and stitching a graft, a small needle creates an entry point in the gum tissue above the recession. The existing tissue is then gently loosened and repositioned over the exposed root. Most patients report feeling fine by the next day, and the results are visible immediately. Both approaches are effective at covering exposed roots and stabilizing the gumline, but the pinhole technique offers a faster, more comfortable recovery for candidates who qualify.
Protecting Your Gums Going Forward
Switch to a soft-bristled toothbrush if you haven’t already. Hold it at a 45-degree angle to the gumline and use short, gentle strokes rather than scrubbing back and forth with pressure. Electric toothbrushes with pressure sensors can help if you tend to brush aggressively. Floss daily to disrupt the bacterial colonies that form between teeth where bristles can’t reach.
If you smoke, quitting is one of the single most effective things you can do for your gums. The dose-dependent relationship means even cutting back helps, though full cessation gives the best results. If you have diabetes, tighter blood sugar control directly slows the progression of gum disease. Regular dental cleanings, typically every six months but sometimes every three to four months for people with active gum disease, keep bacterial buildup from reaching the levels that trigger tissue breakdown.
If you grind your teeth at night, a custom mouthguard reduces the repetitive force that accelerates bone loss. And if your teeth are misaligned, orthodontic treatment can redistribute biting forces more evenly, removing the concentrated pressure that thins bone on vulnerable teeth.