Most tongue sores heal on their own within one to two weeks, but you can speed that process and reduce pain with a few straightforward strategies. The key is keeping the area clean, avoiding irritants that slow tissue repair, and using the right topical treatments when pain is interfering with eating or talking.
Why Your Tongue Is Sore
Before you treat a tongue sore, it helps to know what you’re dealing with. The most common culprits are canker sores (aphthous ulcers), which appear as small white or yellowish ovals with a red border. They’re not contagious, and they tend to show up on the soft tissue of the tongue, inner cheeks, or lips. Biting your tongue, burning it on hot food, or scraping it against a rough tooth or dental appliance can also leave a painful wound that looks and feels similar.
Cold sores are a different problem. Caused by the herpes simplex virus, they typically appear on or near the lips and form fluid-filled blisters before crusting over. Geographic tongue, where smooth red patches appear surrounded by white borders, can also cause discomfort but is harmless and doesn’t require treatment beyond avoiding foods that aggravate it.
Nutritional deficiencies are an underappreciated cause. Low levels of vitamin B12, iron, folate, and zinc are all linked to recurring mouth ulcers, a burning sensation on the tongue, and inflammation of the tongue’s surface. Iron deficiency is especially common in people with papillary atrophy, where the tiny bumps on the tongue flatten and the surface looks smooth. If your tongue sores keep coming back, a simple blood test can check for these deficiencies, and supplementation resolves symptoms in the majority of cases.
Saltwater Rinses and Other Home Treatments
A warm saltwater rinse is the simplest and most effective home remedy. Dissolve half a teaspoon of table salt in a glass of lukewarm water, swish gently for 30 seconds, and spit. Do this two to three times a day. The salt draws fluid from swollen tissue, reduces bacteria around the sore, and supports healing. It will sting briefly on contact, but that fades quickly.
Honey, particularly Manuka honey, has real evidence behind it. In a randomized controlled trial on oral mucositis, patients who applied honey directly to mouth sores had significantly less pain and less severe tissue damage compared to a control group. You can dab a small amount of raw honey onto a tongue sore several times a day. It forms a protective coating and has natural antibacterial properties.
Ice chips or cold water can numb the area temporarily and bring down inflammation. Holding a small piece of ice directly against the sore for a minute or two provides quick relief before meals.
Over-the-Counter Products That Work
If home remedies aren’t enough, several OTC products can both numb the pain and protect the sore while it heals. Look for products containing one of these active ingredients:
- Benzocaine (found in Anbesol, Orabase, Zilactin-B): a topical anesthetic that numbs the sore on contact. Apply directly with a clean finger or cotton swab.
- Hydrogen peroxide rinses (such as Orajel Antiseptic Mouth Sore Rinse or Peroxyl): these clean the wound and reduce bacteria. Use as directed on the label, typically swishing for about a minute.
- Fluocinonide (Lidex, Vanos): a prescription-strength anti-inflammatory gel sometimes available through your dentist. It reduces swelling and pain for larger or more stubborn sores.
Apply any topical product as soon as you notice the sore forming. Early treatment shortens healing time. Pastes and gels tend to stay in place better on the tongue than liquid rinses, so they’re often a better choice for sores in hard-to-reach spots.
Foods to Avoid While Healing
What you eat matters as much as what you apply. Certain foods directly irritate open tissue and can delay healing by days.
Spicy foods are the biggest offenders. Capsaicin, the compound that makes peppers hot, triggers a burning sensation on broken skin. Skip hot sauce, salsa, curry, cayenne, and chili powder until the sore has closed. Acidic foods and drinks are nearly as problematic. Citrus fruits, tomatoes, pineapple, berries, vinegar, coffee, and fruit juice all cause stinging and can slow tissue repair. Hard, crunchy foods like chips, pretzels, popcorn, granola, and crusty bread can physically scrape the sore open again.
Stick to soft, cool, or room-temperature foods while your tongue heals. Yogurt, oatmeal, scrambled eggs, mashed potatoes, smoothies (made without acidic fruit), and soft pasta are all easy choices. Drinking through a straw can help liquids bypass a sore on the front of the tongue.
Preventing Sores From Coming Back
If you get canker sores repeatedly, your toothpaste may be contributing. Sodium lauryl sulfate (SLS), a foaming agent in most toothpastes, has been found to trigger canker sores in people who are prone to them. Switching to an SLS-free toothpaste is one of the easiest preventive steps you can take. Several brands market specifically as SLS-free, and they clean just as effectively.
Address nutritional gaps. Recurrent tongue sores are a well-documented sign of B12, iron, or folate deficiency. B12 deficiency alone can cause tongue inflammation, recurring ulcers, burning sensations, and changes in taste. If you follow a vegetarian or vegan diet, take medications that reduce stomach acid, or have heavy menstrual periods (a common cause of iron depletion), you may be at higher risk. A supplement or dietary change often stops the cycle of recurring sores entirely.
Other practical prevention strategies: avoid biting or chewing on your tongue when stressed, get sharp or broken teeth repaired promptly, and limit alcohol and tobacco, both of which irritate oral tissue.
When a Tongue Sore Could Be Something Else
Most tongue sores are minor and self-limiting. But a sore that hasn’t healed after two weeks deserves professional attention. Mouth cancer can present as a sore that simply won’t go away, a white or reddish patch, a persistent lump, or unexplained pain in the mouth or ear. Difficulty swallowing or pain while chewing are also warning signs.
Major aphthous ulcers, which are larger and deeper than typical canker sores, can take much longer to heal and sometimes leave scars. Extremely slow-healing ulcers are also seen in people with compromised immune systems. If your sore is unusually large, keeps growing, or is accompanied by fever, swollen lymph nodes, or joint pain, those are signs that something beyond a simple canker sore may be going on. A doctor or dentist can examine the area and, if anything looks abnormal, take a small tissue sample to rule out serious conditions.