Most gum sores heal on their own within two weeks, but you can speed up the process and manage pain with a few simple steps at home. The type of sore you’re dealing with determines the best approach, so it helps to understand what you’re looking at before reaching for a remedy.
Identify What Kind of Sore You Have
The most common gum sore is a canker sore: a small white or gray ulcer with a red border. These pop up on the gums, inner lips, or under the tongue, and they’re not contagious. Stress, minor mouth injuries (like biting your cheek or poking yourself with a chip), a weakened immune system, and certain nutritional deficiencies can all trigger them.
Not every gum sore is a canker sore, though. If your gums are red, swollen, and bleed easily across a wider area, that points toward gum disease rather than a standalone ulcer. If you notice a fluid-filled blister on or near your lips, that’s more likely a cold sore, which is viral and requires a different treatment. And a painful, swollen bump near the base of a tooth could signal an abscess, a bacterial infection that needs professional treatment because it can spread.
Salt Water Rinse: Your First Step
A warm salt water rinse is the simplest and most effective thing you can do right away. Dissolve about half a teaspoon of salt in a cup of warm water, swish gently for 30 seconds, and spit. Do this two to three times a day.
Salt water works by flushing bacteria from the inflamed tissue and creating an environment where they’re less likely to thrive. The warmth also increases blood flow to the gums, which supports your body’s natural repair process. It won’t sting the way mouthwash can, and it costs almost nothing.
Over-the-Counter Pain Relief
If the sore is painful enough to interfere with eating or talking, a topical numbing gel can help. Look for products containing benzocaine, which temporarily blocks nerve signals at the site. You’ll find these sold as oral gels or pastes in any pharmacy. Wash your hands before applying, dab a small amount directly on the sore, and avoid eating or drinking for a few minutes afterward so the gel stays in place. Don’t reapply more often than the label directs.
For broader pain and inflammation, standard over-the-counter pain relievers taken by mouth work well. Hydrogen peroxide rinses (diluted to the concentration on the bottle) are another option. They help clean the wound and reduce bacteria, though they taste unpleasant and shouldn’t be swallowed.
Honey as a Healing Aid
Applying pure, undiluted honey directly to a gum sore is more than a folk remedy. A systematic review of 13 studies found that honey reduced the severity or duration of oral ulcers in 12 of them. In one study, only about 9% of patients using honey developed severe mouth sores compared to roughly 62% in the control group.
The approach is straightforward: dab a small amount of honey onto the sore three times a day. Manuka honey is commonly recommended for its antimicrobial properties, but regular raw honey also showed benefits in research. The honey forms a protective coating, reduces inflammation, and creates conditions that discourage bacterial growth. It’s a particularly good option if you prefer to avoid medicated products.
What Makes Gum Sores Worse
While you’re waiting for a sore to heal, a few things can slow the process or increase irritation. Acidic foods like citrus, tomatoes, and vinegar-based dressings tend to sting and aggravate the tissue. Spicy foods do the same. Crunchy or sharp-edged foods (chips, crackers, crusty bread) can physically re-injure the area.
Your toothpaste may also be a factor. Many toothpastes contain sodium lauryl sulfate (SLS), a foaming agent that can strip the delicate lining of your mouth. Research published in the British Dental Journal found that SLS-containing toothpaste can increase the frequency of recurring mouth ulcers. One clinical study measured four times fewer soft tissue lesions after switching to an SLS-free toothpaste. If you get gum sores regularly, switching to an SLS-free formula is one of the easiest changes you can make.
Nutritional Gaps That Cause Recurring Sores
If gum sores keep coming back, your diet may be part of the picture. Deficiencies in vitamin B12, folate, and iron are all linked to recurring mouth ulcers. The NHS lists mouth ulcers as a recognized symptom of B12 or folate deficiency. You don’t need to be severely deficient for this to happen; even borderline-low levels can make your oral tissue more fragile and slower to heal.
Foods rich in B12 include meat, fish, eggs, and dairy. Folate is found in leafy greens, beans, and fortified grains. If you eat a restricted diet or suspect a deficiency, a simple blood test can confirm it. Correcting the deficiency often reduces how often sores appear.
When a Gum Sore Needs Professional Attention
Most gum sores resolve within two weeks without any treatment at all. If yours lasts longer than that, it’s worth scheduling an appointment with a dentist or doctor. A sore that won’t heal can occasionally indicate something more serious that needs evaluation.
Other signs that warrant a visit sooner: a sore accompanied by fever, rapid swelling that spreads beyond the original spot, pus or drainage near a tooth, or pain severe enough that you can’t eat. Tooth abscesses in particular can spread to other parts of the body if left untreated, so swelling near a tooth root shouldn’t be ignored. Bleeding, tender, or swollen gums that persist across multiple teeth point toward gum disease, which benefits significantly from early professional treatment.