Mouth ulcers are common and should clear up on their own within a week or 2. But see a GP or dentist if you have a mouth ulcer that lasts longer than 3 weeks. Mouth ulcers are rarely a sign of anything serious, but may be uncomfortable to live with. They need time to heal and there's no quick fix. Avoiding things that irritate your mouth ulcer should help: use a soft-bristled toothbrush drink cool drinks through a straw eat softer foods get regular dental check-ups eat a healthy, balanced diet Don’t
A pharmacist can help with mouth ulcersA pharmacist can recommend a treatment to speed up healing, prevent infection or reduce pain, such as:
You can buy these without a prescription, but they may not always work. How to rinse with salt mouthwash
Find a pharmacy Non-urgent advice: See a dentist or GP if your mouth ulcer:
Although most mouth ulcers are harmless, a long-lasting mouth ulcer is sometimes a sign of mouth cancer. It's best to get it checked. Treatment from a dentist or GPA GP or dentist may prescribe stronger medicine to treat severe, persistent or infected mouth ulcers. Possible treatments include:
Check if you have a mouth ulcerMouth ulcers usually appear inside the mouth, on the cheeks or lips. Ulcers can also appear on the tongue.You may have more than 1 ulcer at a time, and they can change in size. Mouth ulcers are not contagious and should not be confused with cold sores. Cold sores appear on the lips or around the mouth and often begin with a tingling, itching or burning sensation. Causes of mouth ulcersMost single mouth ulcers are caused by things you can try to avoid, such as:
Sometimes they're triggered by things you cannot always control, such as:
If you have several mouth ulcers, it can be a symptom of:
Page last reviewed: 19 January 2021 How long does it take for mouth sores to heal?Mouth sores often go away in 10 to 14 days, even if you do not do anything. They sometimes last up to 6 weeks. The following steps can make you feel better: Avoid hot beverages and foods, spicy and salty foods, and citrus.
What causes sores in the mouth?Food sensitivities, particularly to chocolate, coffee, strawberries, eggs, nuts, cheese, and spicy or acidic foods. A diet lacking in vitamin B-12, zinc, folate (folic acid) or iron. An allergic response to certain bacteria in your mouth. Helicobacter pylori, the same bacteria that cause peptic ulcers.
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