Most tongue sores heal on their own within one to two weeks without any special treatment. What you do in the meantime, though, can make a real difference in how much they hurt and how quickly they resolve. The key is reducing irritation, managing pain, and giving the tissue what it needs to repair itself.
What’s Causing Your Tongue Sore
The most common tongue sore is a canker sore (aphthous ulcer), a small, shallow ulcer with a white or yellowish center and a red border. Canker sores don’t have a single known cause, but they can be triggered by physical injury (biting your tongue, rough dental work), stress, smoking, or deficiencies in folic acid, iron, or vitamin B12. They are not contagious.
Fever blisters, on the other hand, are caused by the herpes simplex virus (usually type 1). These tend to appear as clusters of small, fluid-filled blisters, often on the lips or outer edges of the mouth, though they can show up on the tongue. Unlike canker sores, fever blisters are contagious. The distinction matters because treatments differ: antiviral medications help fever blisters, while canker sores respond to anti-inflammatory and pain-relieving approaches.
Other possible causes include accidentally biting or burning your tongue, irritation from sharp tooth edges or braces, and fungal infections like oral thrush.
Salt Water Rinse: The First Step
A simple salt water rinse is one of the most effective things you can do at home. Mix 1 teaspoon of salt into 8 ounces of warm water, swish it around your mouth for up to 30 seconds, and spit it out. You can do this several times a day, especially after meals. The salt helps draw fluid out of the sore, reducing swelling, while creating an environment that’s less hospitable to bacteria. If it stings too much, cut the salt down to half a teaspoon.
Over-the-Counter Pain Relief
Topical numbing gels and ointments containing benzocaine are widely available at pharmacies. You apply the gel directly to the sore up to four times a day. It temporarily numbs the area, which is especially helpful before eating. Benzocaine also comes in lozenge form, dissolved slowly in the mouth every two hours as needed. These products won’t speed healing, but they make the process far more tolerable.
Protective pastes that form a barrier over the sore can also help. These stick to the moist tissue inside your mouth and shield the ulcer from further contact with food and teeth.
Honey as a Topical Treatment
Applying a small amount of pure, undiluted honey directly to a tongue sore may help it heal faster. A systematic review of 13 studies found that honey reduced both the severity and duration of oral ulcers compared to control groups. One study showed honey specifically shortened recovery time for moderate to severe mouth sores. The catch: some people find the initial application stings. If you try this, use plain honey (not flavored or processed varieties) and dab a small amount on the sore a few times a day.
Foods That Slow Healing
What you eat while your tongue heals matters more than you might expect. Certain foods physically or chemically irritate the open tissue, causing pain and potentially delaying recovery.
- Spicy foods like hot peppers, sriracha, salsa, and curry contain capsaicin, which directly irritates open sores.
- Acidic foods and drinks such as citrus fruits, tomatoes, pineapple, coffee, fruit juice, and alcohol cause a stinging or burning sensation and can slow healing.
- Hard and crunchy foods like chips, pretzels, popcorn, crackers, and crusty bread can scrape the sore and reinjure the tissue.
Stick to soft, bland, room-temperature or cool foods while the sore is active. Think yogurt, oatmeal, mashed potatoes, smoothies, and scrambled eggs. Drinking through a straw can help liquids bypass a painful spot on the front of the tongue.
Nutritional Deficiencies Worth Checking
If you get tongue sores repeatedly, the cause may be nutritional. Deficiencies in vitamin B12, folate, and iron are all linked to recurrent mouth ulcers and a sore, red tongue. This is worth paying attention to if you follow a restricted diet, have heavy periods, or have digestive conditions that affect nutrient absorption. A simple blood test can identify these deficiencies, and correcting them often reduces or eliminates recurring sores.
When a Sore Needs Medical Attention
A standard canker sore or minor tongue injury should clear up within one to two weeks. If a sore lasts longer than two to three weeks, that’s a signal to get it evaluated by a doctor or dentist. Persistent sores that don’t heal are one of the early warning signs of oral cancer, along with unusual color changes and firm or hard areas on the tongue.
A clinician will visually examine the area and feel the tongue for abnormal texture. This isn’t something to panic about, as most persistent sores turn out to be benign. But a sore that simply won’t go away deserves a professional look. The same applies if you’re developing large, unusually painful, or frequently recurring ulcers, as these may benefit from prescription treatment.
Prescription Options for Severe Cases
For sores that are especially large, painful, or slow to heal, doctors sometimes prescribe a compound mouth rinse often called “magic mouthwash.” This is a custom-mixed liquid that typically combines several ingredients: a numbing agent like lidocaine to block pain, an antihistamine to reduce swelling, an antacid that helps the other ingredients coat the tissue, and sometimes a corticosteroid to tamp down inflammation. If infection is suspected, an antibiotic or antifungal may be added to the mix. You swish it around your mouth before meals or at set intervals throughout the day. These rinses are generally reserved for people dealing with severe or treatment-related mouth sores, not a one-off canker sore.