Gum recession happens when the tissue surrounding your teeth wears away or pulls back, exposing more of the tooth or its root. It’s one of the most common dental problems, often developing so gradually that you don’t notice it until your teeth look longer than usual or feel sensitive to cold drinks. The causes range from how you brush your teeth to factors completely outside your control, like genetics and hormones.
Brushing Too Hard
One of the most straightforward causes is also one of the most fixable. Brushing with too much pressure or using a stiff-bristled toothbrush physically wears down both the enamel on your teeth and the gum tissue at the margins. Over months and years, that repeated abrasion pushes the gumline upward (or downward, on lower teeth), leaving root surfaces exposed. The irony is that people who brush aggressively often do so because they’re trying to keep their teeth clean, but the damage to their gums can end up being worse than what they’re trying to prevent.
A soft-bristled toothbrush and gentle, circular motions are enough to remove plaque effectively. If you notice that your toothbrush bristles are splayed and flattened within a few weeks, that’s a reliable sign you’re pressing too hard.
Gum Disease
Periodontal disease is the leading cause of gum recession. It starts as gingivitis, an inflammation triggered by bacteria that accumulate along and under the gumline. Left unchecked, gingivitis progresses into periodontitis, where the infection destroys the bone and connective tissue holding your teeth in place. As bone is lost, the gums follow it down, receding and creating deeper “pockets” between the teeth and gums.
Dentists track this process by measuring pocket depth with a thin probe placed between each tooth and the surrounding gum. Healthy pockets measure 1 to 3 millimeters. Pockets deeper than 4 millimeters typically indicate periodontitis is underway. Six measurements are taken around every tooth, so even localized recession gets documented early.
Your Genetics and Gum Thickness
Some people are simply built with thinner gum tissue, and that thin tissue is more vulnerable to recession from nearly every cause, whether it’s infection, trauma, orthodontic treatment, or dental work. Research consistently shows that a thin gingival phenotype (the dental term for naturally thin gums) carries a higher risk of recession compared to thicker tissue. The front teeth, both upper and lower, along with premolars, are the sites most likely to have this thinner tissue, which is why recession often shows up there first.
There’s also a connection between gum thickness and bone thickness. People with thinner gums tend to have thinner bone underneath, and that bone is the structural support the gum sits on. When the bone is thin, it erodes more easily, and the gum recedes along with it. Studies have confirmed a statistically significant positive correlation between gum thickness and the thickness of the underlying bone. You can’t change your anatomy, but knowing you have thinner tissue means being more vigilant about the causes you can control.
Teeth Grinding and Clenching
Grinding your teeth at night or clenching your jaw during the day puts enormous, repetitive force on your teeth and the structures around them. Over time, that pressure weakens the gum tissue and the periodontal ligament that anchors each tooth. The gums, acting as a protective foundation, gradually pull away from the teeth under this constant mechanical stress. The process also triggers chronic low-grade inflammation, which accelerates the breakdown.
People who grind and also have a genetic tendency toward thinner gum tissue or periodontal weakness tend to see recession progress faster. If you wake up with jaw soreness or headaches, or if your partner hears you grinding at night, a custom night guard can absorb much of that force before it reaches your gums.
Smoking and Tobacco Use
Tobacco use damages gums through multiple pathways at once. According to the CDC, smoking weakens the immune system’s ability to fight gum infections, and once damage occurs, it also slows healing. Nicotine constricts blood vessels, reducing blood flow to the gums, which deprives the tissue of oxygen and nutrients it needs to stay healthy and repair itself. Smokers develop periodontitis at higher rates and lose more gum and bone tissue than nonsmokers with the same level of plaque buildup. The combination of increased infection risk and impaired healing makes tobacco one of the strongest risk factors for recession.
Hormonal Changes
Fluctuations in estrogen and progesterone alter how gum tissue responds to bacteria. During puberty, pregnancy, and while taking hormonal contraceptives, surges in these hormones increase blood flow to the gums, making them swollen, sensitive, and more prone to bleeding and irritation. That heightened inflammatory response gives bacteria a better foothold, increasing the risk of gingivitis and, over time, recession.
Menopause brings a different problem. Declining estrogen levels contribute to bone loss throughout the body, including the jawbone. As bone around the teeth diminishes, gums recede, roots become exposed, and the teeth grow less stable. This creates a cycle where exposed roots are harder to keep clean, which invites more bacterial buildup and further gum and bone loss.
Other Contributing Factors
Misaligned teeth or a crooked bite can concentrate chewing forces on certain teeth, wearing down the gum and bone in those areas faster than elsewhere. Orthodontic treatment itself, while it corrects alignment, can sometimes trigger recession if the teeth are moved through thin bone or tissue.
Piercings on the lip or tongue can rub against the gums constantly, causing mechanical irritation that wears the tissue away over months. Even habits like holding objects (pens, nails) between your teeth can create localized trauma that leads to recession in specific spots.
Early Warning Signs
Recession is easy to miss because it doesn’t usually hurt in the early stages. The first thing most people notice is increased sensitivity to hot, cold, or sweet foods, especially near the gumline. Your teeth may look slightly longer than they used to, or you might feel a notch where the tooth meets the gum when you run your tongue or fingernail along the margin. Bleeding during brushing or flossing is another early signal that the gums are inflamed and potentially starting to pull away.
By the time recession is visible to the naked eye, it may already measure several millimeters. That’s why regular dental checkups with periodontal probing are valuable. Those measurements create a baseline so that even small changes, a pocket deepening from 2 millimeters to 4, get caught before significant tissue is lost.
Can Receded Gums Grow Back?
Gum tissue does not regenerate on its own. Unlike skin or the lining of your mouth after a burn, receded gums will not regrow to their original position. Once the tissue is gone, it stays gone without intervention. That said, the progression can be stopped. A thorough professional cleaning to remove bacteria and tartar from below the gumline, combined with improved brushing and flossing habits, can halt the disease process and stabilize your gums where they are.
For more advanced cases, surgical options exist. A periodontist can perform gum grafts, where tissue (often taken from the roof of your mouth) is placed over the exposed root to restore coverage. In some situations, the damaged tissue is reshaped and the pockets around the teeth are reduced surgically to make them easier to keep clean. These procedures are typically reserved for cases where recession threatens tooth stability and nonsurgical approaches haven’t stopped the progression.
The most effective strategy is catching recession early and addressing whatever is driving it, whether that means switching to a softer toothbrush, treating gum disease, wearing a night guard, or quitting tobacco. Most causes of recession are either preventable or manageable once you know what to look for.