Most tongue sores heal on their own within 10 to 14 days, but you can speed up recovery and reduce pain with a few simple strategies. The right approach depends on what type of sore you’re dealing with and how long you’ve had it.
What’s Causing Your Tongue Sore
Before treating a tongue sore, it helps to know what you’re working with. The most common culprits are canker sores (small, shallow ulcers with a white or yellowish center), physical trauma from biting your tongue or burning it on hot food, and irritation from rough tooth edges or dental work. Less common causes include cold sores (fluid-filled blisters caused by the herpes virus), oral thrush (a fungal infection that appears as white patches), and allergic reactions to certain foods or oral care products.
Canker sores are by far the most frequent reason people search for relief. They’re not contagious, but they can make eating and talking miserable for a week or more. Cold sores, by contrast, are contagious and typically appear on the outer edges of the lips, though they can show up on the tongue. Thrush requires antifungal treatment rather than the home remedies described below.
Saltwater Rinse: The Best First Step
A warm saltwater rinse is the simplest and most effective thing you can do at home. Mix 1 teaspoon of salt into 8 ounces of warm water, swish it gently around your mouth for 30 seconds, and spit it out. This removes bacteria from the area, reduces inflammation, and promotes tissue repair. Dentists recommend saltwater rinses after dental procedures for the same reasons.
Rinse two to three times a day, especially after meals. It will sting briefly on contact with the sore, but that fades quickly. You can continue this throughout the healing process.
Over-the-Counter Pain Relief
Topical numbing gels, sprays, and ointments containing benzocaine can take the edge off a painful tongue sore. Apply a small amount directly to the sore up to four times a day. Don’t use benzocaine products for more than two days without checking with a doctor or dentist, and avoid them entirely for children under two.
Benzocaine lozenges are another option. Dissolve one slowly in your mouth every two hours as needed. These work well when you need relief during the day but don’t want to keep reapplying gel.
Milk of magnesia also works as a protective coating. Dab a small amount directly onto the sore a few times a day. It coats the surface, neutralizes acid, and creates a barrier that reduces irritation from food and saliva.
Foods to Avoid While Healing
What you eat matters more than you might expect. Certain foods irritate the sore directly and can slow healing. Until your tongue feels better, stay away from:
- Acidic foods: citrus fruits, tomatoes, ketchup, marinara sauce, pineapple, pickled vegetables
- Spicy foods: curry, chili, hot sauce, salsa
- Rough or scratchy textures: dry crackers, crusty bread, bagels, tortilla chips
- Irritating drinks: citrus juice, carbonated beverages, alcohol, very hot coffee or tea
Stick to soft, cool, or lukewarm foods. Yogurt, smoothies, mashed potatoes, scrambled eggs, and oatmeal are all easy on the mouth. Cold foods like ice cream or frozen fruit can provide temporary numbing relief on their own.
Why Some People Get Tongue Sores Repeatedly
If tongue sores keep coming back, your body may be low on specific nutrients. Recurring mouth ulcers are commonly linked to deficiencies in vitamin B12, folate (vitamin B9), and iron. These nutrients support cell repair and tissue regeneration in the mouth. When levels drop, the lining of your mouth becomes more sensitive to irritation and breaks down more easily.
A B12 deficiency can also cause a smooth, burning sensation on the tongue even without a visible sore. Low iron often shows up as a generally sore or pale tongue. If you’re getting canker sores more than a few times a year, a simple blood test can check whether a nutritional gap is contributing.
Other common triggers for recurrent sores include stress, hormonal changes, food sensitivities (especially to acidic or spicy foods), and irritation from braces or ill-fitting dentures. Switching to a toothpaste without sodium lauryl sulfate, a foaming agent that can irritate the mouth lining, helps some people reduce flare-ups.
When a Tongue Sore Needs Medical Attention
A sore that hasn’t healed within two weeks needs to be evaluated by a doctor or dentist. This is especially important if you use tobacco or drink alcohol regularly, since both increase the risk of oral cancer. The first sign of tongue cancer is often a sore on the tongue that simply won’t heal.
Other warning signs to watch for include a red or white patch on the tongue that doesn’t go away, unexplained bleeding in the mouth, a lump or thickening on the tongue, numbness, difficulty swallowing or moving your tongue, or a persistent sore throat. None of these automatically mean cancer, but they all warrant a professional evaluation. Most tongue sores turn out to be harmless, but the ones that aren’t are far easier to treat when caught early.