Most gum sores heal on their own within one to two weeks, but you can speed up recovery and reduce pain with a few straightforward treatments at home. The right approach depends on what type of sore you’re dealing with, so identifying it first will save you time and discomfort.
Identify What Kind of Sore You Have
Not all gum sores are the same, and they respond to different treatments. The three most common types are canker sores, cold sores, and gum abscesses.
Canker sores are small white or gray spots with a red border. They show up on the inside of your lips, under your tongue, or along the back of your throat and gums. They’re not contagious and usually triggered by stress, minor injuries (like biting your cheek), acidic foods, or nutritional gaps.
Cold sores are fluid-filled blisters that look red, yellow, or gray. They typically appear on or around your lips, under your nose, or on your chin rather than directly on the gums. They’re caused by the herpes simplex virus and are contagious.
Gum abscesses are swollen, painful bumps on the gum tissue itself, often near the base of a tooth. They signal a bacterial infection, sometimes tied to gum disease, and usually need professional treatment.
Salt Water Rinses
A warm salt water rinse is the simplest and most effective first step for almost any gum sore. It reduces bacteria, draws out fluid from inflamed tissue, and creates an environment that helps the sore heal faster. Mix 1 teaspoon of salt into 8 ounces of warm water, swish it around your mouth for 30 seconds, and spit it out. If the rinse stings too much, drop to half a teaspoon for the first day or two.
One rinse per day is generally enough. Doing it too frequently can dry out your mouth, which actually slows healing.
Over-the-Counter Pain Relief
If the sore is making it hard to eat or talk, a topical numbing gel can help. Products like Orajel contain benzocaine at 20% concentration, which temporarily numbs the tissue on contact. You apply a small amount directly to the sore, and relief kicks in within a minute or two. Reapply as needed, but follow the product’s directions on frequency.
For canker sores specifically, look for oral patches or gels designed to coat the sore and protect it from further irritation while you eat. Antiseptic mouthwashes containing hydrogen peroxide (diluted to the concentration on the label) can also help keep the area clean. Avoid alcohol-based mouthwashes, which tend to sting and can irritate the sore further.
Other Home Remedies That Help
Beyond salt water, a few other approaches can make a real difference:
- Ice or cold compress: Holding a small piece of ice against the sore or pressing a cold cloth to the outside of your cheek numbs pain and reduces swelling.
- Baking soda paste: Mix a small amount of baking soda with water to form a paste and dab it on the sore. It neutralizes acids in the mouth that irritate open tissue.
- Honey: A thin layer of raw honey applied to a canker sore has natural antibacterial properties and can reduce healing time.
- Avoid trigger foods: Spicy, acidic, or crunchy foods scrape against the sore and prolong inflammation. Stick to soft, mild foods until it heals.
When the Sore Keeps Coming Back
If you get gum sores repeatedly, the cause may be nutritional. There’s strong evidence linking recurrent mouth sores to deficiencies in vitamin B12, folate, and vitamin C.
Vitamin B12 deficiency causes increased sensitivity in the mouth lining along with painful ulcers. It also shows up as a sore, glossy-looking tongue. Folate deficiency disrupts the normal turnover of cells in your mouth’s lining, making it more vulnerable to sores and erosions. People low in folate often describe a burning sensation along with recurring ulcers. Vitamin C deficiency leads to gums that bleed easily, slow wound healing, and frequent small painful ulcers.
If you suspect a deficiency, a simple blood test from your doctor can confirm it. Supplementation often resolves the cycle of recurring sores within weeks.
Your Toothpaste Might Be a Factor
Many popular toothpastes contain sodium lauryl sulfate (SLS), a foaming agent that can irritate the delicate tissue inside your mouth. Research has shown that SLS toothpaste can increase the frequency of recurring mouth ulcers. One clinical study found four times fewer soft tissue lesions after using an SLS-free toothpaste compared to one containing SLS. If you’re prone to gum sores, switching to an SLS-free toothpaste is one of the easiest changes you can make. Brands like Sensodyne, Biotene, and Verve all offer SLS-free options.
Gum Sores During Pregnancy
Pregnancy makes gum sores and inflammation much more common. Hormonal changes increase blood flow to the gums and alter how your body responds to plaque, which means even minor buildup can cause swelling, tenderness, and sores that wouldn’t normally bother you.
Safe management during pregnancy includes brushing twice daily, flossing once a day, and gargling with a warm salt water rinse (1 teaspoon of salt in 1 cup of warm water). Use alcohol-free mouthwash only. Cutting back on sugary foods and drinks also helps, since they accelerate plaque buildup and increase your risk of both gum inflammation and cavities. A professional dental cleaning to remove plaque is the most effective treatment for pregnancy-related gum problems, and dental X-rays during pregnancy are considered safe with proper shielding.
Signs a Gum Sore Needs Professional Attention
Most gum sores are harmless and temporary. But any sore that hasn’t healed within 14 days should be examined by a dentist or doctor. A sore that lingers beyond two weeks is one of the key warning signs that something more serious could be going on, including oral cancer.
Other symptoms to watch for alongside a persistent sore include a lump or thickening in the mouth, a white or red patch on the gums or tongue, unexplained bleeding, numbness in the tongue or lower lip, pain while swallowing or chewing, persistent bad breath that doesn’t improve with oral care, or a lump in the neck. Any combination of these alongside a sore that won’t heal warrants a prompt evaluation.
Gum abscesses also need professional care. If you have a painful, swollen bump on your gum near a tooth, especially with fever or a bad taste in your mouth, that’s likely a bacterial infection that won’t resolve with home treatment alone.