Sore gums are one of the most common oral health complaints, and in most cases they point to inflammation caused by bacteria building up along the gumline. Nearly 30% of adults between 30 and 44 have some form of gum disease, and that number climbs to 60% for people over 65. But bacterial buildup isn’t the only explanation. Hormonal changes, certain medications, vitamin deficiencies, and even brushing too hard can all leave your gums tender and swollen.
Gum Disease: The Most Likely Cause
The most common reason for persistent gum soreness is gingivitis, the earliest stage of gum disease. Plaque, a sticky film of bacteria, accumulates where your teeth meet your gums. Your immune system responds by flooding the area with inflammatory compounds that make blood vessels expand and nerve endings more sensitive. That’s what produces the redness, puffiness, and soreness you feel. Bleeding when you brush or floss is the hallmark sign.
Gingivitis is reversible. But if plaque hardens into tarite (tartar) and stays in place, the inflammation can progress to periodontitis. At that stage, the gums start pulling away from the teeth and forming deep pockets. The tissue may turn dark red or even purplish, and the bone that holds teeth in place begins to break down. Periodontitis doesn’t just cause soreness; it can eventually lead to loose teeth and tooth loss. If your gums have been sore for more than a week or two, or you notice them receding, it’s worth getting evaluated rather than assuming it will resolve on its own.
Other Reasons Your Gums Hurt
Brushing or Flossing Too Aggressively
Gum tissue is delicate. A hard-bristled toothbrush or aggressive flossing technique can physically irritate and even cut the tissue, leaving it sore for days. Switching to a soft-bristled brush and using gentle, short strokes rather than scrubbing back and forth often resolves this type of soreness within a week.
Hormonal Shifts
Pregnancy, menstruation, and puberty all cause fluctuations in hormone levels that increase blood flow to the gums. This makes the tissue more reactive to even normal amounts of plaque. “Pregnancy gingivitis” is common enough that many women notice their gums becoming puffy and tender in the second trimester, even with good brushing habits.
Canker Sores and Injuries
A canker sore on the gum, a burn from hot food, or irritation from a rough-edged dental appliance can all cause localized soreness. These are usually easy to identify because the pain is concentrated in one spot and you can often see a sore, cut, or red area. Most heal within one to two weeks without treatment.
Vitamin C Deficiency
Vitamin C is essential for producing collagen, the protein your body uses to maintain the structure of gum tissue and blood vessel walls. When levels drop low enough, gums become fragile, bleed easily, and feel sore. Full-blown scurvy is rare in developed countries, but subclinical deficiency is more common than most people realize, especially in smokers and people with very limited diets.
Medications That Cause Gum Overgrowth
Certain medications can cause your gum tissue to physically enlarge and become tender. About half of patients taking the seizure medication phenytoin develop some degree of gum overgrowth. Calcium channel blockers used for blood pressure, particularly nifedipine, cause it in roughly 38% of users. The immunosuppressant cyclosporine carries a similar risk. Overall, roughly 40 to 50% of people on these drugs will notice their gums growing over or around their teeth, which creates pockets that trap bacteria and lead to further soreness. If you started a new medication and your gums became sore shortly after, that connection is worth raising with your prescriber.
What’s Happening Inside Sore Gums
When bacteria invade gum tissue, your immune cells release a cascade of inflammatory molecules, including prostaglandins and several signaling proteins. These compounds don’t just fight infection. They also bind directly to pain-sensing nerve endings in the gum tissue and lower their activation threshold. In practical terms, this means things that wouldn’t normally hurt (chewing, brushing, even cold air) start to trigger pain. The longer the inflammation goes on, the more sensitized those nerve endings become, which is why chronic gum soreness often feels like it’s getting worse over time even if the underlying cause hasn’t changed.
What You Can Do at Home
A warm saltwater rinse is one of the simplest and most effective ways to reduce gum inflammation. Mix one teaspoon of salt into eight ounces of warm water and swish gently for 15 to 20 seconds. If your gums are very tender, start with half a teaspoon of salt for the first day or two. Salt draws fluid out of swollen tissue and creates an environment that’s less hospitable to bacteria. You can do this two to three times a day.
Beyond rinsing, focus on gentle but consistent oral hygiene. Use a soft-bristled toothbrush angled at 45 degrees toward the gumline. Brush twice daily and floss once. If flossing is painful, try a water flosser or interdental brushes, which are easier on inflamed tissue. Soreness from mild gingivitis often improves noticeably within one to two weeks of consistent cleaning, because removing plaque allows the inflammation cycle to wind down.
Over-the-counter pain relievers like ibuprofen can help manage soreness while you address the underlying cause. Ibuprofen works by blocking some of the same inflammatory compounds (prostaglandins) that sensitize your gum nerves, so it targets both pain and swelling.
What Happens at the Dentist
If home care doesn’t improve things within two weeks, a dental visit can determine whether you’re dealing with simple gingivitis or something more advanced. For gingivitis, a professional cleaning to remove plaque and hardened tartar is usually all that’s needed.
For periodontitis, the standard first-line treatment is a deep cleaning called scaling and root planing. The dental hygienist cleans below the gumline and smooths the root surfaces so gums can reattach more easily. The American Dental Association recommends this as the initial approach for periodontitis based on a moderate benefit with minimal side effects. Your mouth will likely be numbed for the procedure, and you may have some tenderness for a few days afterward, but most people return to normal eating within a week.
In cases where deep cleaning alone isn’t enough, your dentist may place a small medicated chip directly into the gum pocket or prescribe a short course of low-dose medication to help control the bacterial infection. More advanced options like laser treatment exist, but the evidence supporting them is limited.
Signs That Gum Soreness Is Serious
Most gum soreness is manageable and not dangerous. But a dental abscess, a pocket of infection at the root of a tooth or deep in the gum, can escalate quickly. Warning signs include a persistent, throbbing pain that doesn’t respond to over-the-counter pain relievers, a visible bump or pimple on the gum, fever, and swollen lymph nodes under your jaw or along your neck.
If you develop a fever along with facial swelling, or if swelling in your cheek, jaw, or neck makes it hard to breathe or swallow, that indicates the infection may be spreading into deeper tissues. This is a situation that warrants an emergency room visit, not a wait-and-see approach.