Most tongue sores heal on their own within one to two weeks, but the pain can make eating, drinking, and even talking miserable in the meantime. The fastest relief comes from a combination of strategies: numbing the area, keeping it clean, avoiding irritants, and giving the tissue what it needs to repair. Here’s what works.
Saltwater Rinse: The Simplest First Step
A warm saltwater rinse is the most accessible and effective starting point. Mix 1 teaspoon of salt into 8 ounces of warm water until fully dissolved, swish it around your mouth for 15 to 30 seconds, then spit it out. You can do this up to four times a day, plus after meals. The salt draws fluid out of swollen tissue, which reduces inflammation, and creates a temporarily inhospitable environment for bacteria that could slow healing.
Over-the-Counter Numbing Gels
If the pain is interfering with eating or sleeping, a topical oral gel containing 20% benzocaine provides fast, localized numbing. These products (sold under names like Orajel and Anbesol) can be applied directly to the sore up to four times a day. Some formulations also include menthol for a cooling sensation and zinc chloride, which has mild antiseptic properties.
A few practical tips: dry the area gently with a tissue before applying so the gel sticks better, and try not to eat or drink for at least 15 minutes afterward. The numbing effect typically lasts 30 to 60 minutes, which is often enough to get through a meal comfortably.
Aloe Vera Gel for Faster Healing
Aloe vera gel applied directly to an oral ulcer can shorten healing time. A systematic review of randomized controlled trials found that aloe vera led to statistically significantly shorter healing durations compared to other treatments or placebo. Its pain-relieving effects were comparable to other interventions, not superior, but it had higher safety and virtually no side effects. The gel forms a protective coating over the sore that shields it from further irritation while promoting tissue repair. Look for pure aloe vera gel intended for oral use, or snip a fresh leaf and apply the inner gel directly.
Foods and Drinks to Avoid
What you put in your mouth matters as much as what you put on the sore. Acidic foods and drinks, including citrus fruits, tomatoes, vinegar-based dressings, and carbonated beverages, chemically irritate open tissue and can intensify pain significantly. Spicy foods have a similar effect. Crunchy or sharp-edged foods like chips, crackers, and crusty bread can physically reopen a healing sore.
Stick to soft, cool, or room-temperature foods while you’re healing: yogurt, smoothies, scrambled eggs, mashed potatoes, oatmeal. Cold foods like ice pops or chilled applesauce can also provide temporary numbing relief on their own.
Switch to an SLS-Free Toothpaste
Sodium lauryl sulfate, the foaming agent in most toothpastes, is a known trigger for recurrent mouth sores. A systematic review found that switching to an SLS-free toothpaste significantly reduced the number of ulcers, the duration of each ulcer, the number of episodes, and ulcer pain across all four measured parameters. If you get tongue sores repeatedly, this single change can make a meaningful difference. Brands like Sensodyne, Biotene, and Verve all offer SLS-free options, usually labeled on the packaging.
Nutritional Deficiencies That Cause Recurring Sores
If tongue sores keep coming back, the problem may not be in your mouth at all. Deficiencies in vitamin B12, iron, folic acid, and vitamin C are all linked to recurrent oral ulcers. B12 deficiency is particularly common: normal blood levels range from about 116 to 781 pmol/L, and patients with recurrent sores have been documented with levels as low as 64 to 65 pmol/L, roughly half the minimum threshold.
You don’t need to guess. A simple blood test can check these levels. People at higher risk for B12 deficiency include vegetarians and vegans (since B12 comes primarily from animal products), older adults who absorb it less efficiently, and anyone taking long-term acid-reducing medications. If a deficiency is found, supplementation often resolves the sores.
Prescription Options for Severe Cases
When over-the-counter options aren’t enough, a doctor or dentist can prescribe stronger treatments. Prescription-strength topical numbing agents provide longer and more complete pain relief than store-bought gels. For severe or widespread sores, particularly those caused by chemotherapy or radiation, a compounded “magic mouthwash” is sometimes prescribed. These typically contain an antihistamine to reduce swelling, a steroid to control inflammation, and an antifungal to prevent yeast overgrowth, all in a single rinse. The exact formulation varies by pharmacy and prescriber.
Other Habits That Slow Healing
Tobacco use irritates oral tissue and delays wound healing. If you smoke or use chewing tobacco, sores will take longer to resolve and are more likely to recur. Aggressive brushing is another overlooked culprit. Brushing your tongue too hard or using abrasive toothpastes strips the protective layer of the mucosa. Alcohol-based mouthwashes can also burn and irritate open sores, so switch to an alcohol-free formula while you’re healing.
Stomach acid reflux (GERD) is a less obvious trigger. Acid that reaches the mouth, especially at night, can irritate the tongue and create a cycle of slow healing and new sores. If you frequently wake up with a sour taste or notice your sores worsen in the morning, reflux may be contributing.
When a Tongue Sore Needs Medical Attention
A typical canker sore or minor irritation should be noticeably improving within a week and fully healed within two. If a sore on your tongue persists for more than two weeks, it needs to be evaluated by a healthcare provider or dentist. A non-healing sore is one of the primary warning signs of oral cancer, and two weeks is the standard threshold for seeking evaluation.
Other signs that warrant a visit: a sore that’s growing rather than shrinking, unexplained numbness in the tongue, difficulty swallowing, a lump in the neck, or a sore that bleeds easily when touched. These don’t necessarily mean cancer, but they do mean something beyond a routine ulcer is going on.
Burning Without a Visible Sore
If your tongue burns or stings but looks completely normal, you may be dealing with burning mouth syndrome. This condition is defined by burning pain in normal-appearing oral tissue lasting at least four to six months. Key features include pain that’s present daily, affects both sides of the tongue, stays constant or worsens as the day goes on, and paradoxically improves while eating or drinking. The absence of any visible sore or lesion is actually required for this diagnosis. Burning mouth syndrome has different causes and treatments than typical tongue sores, so recognizing the pattern matters.