Mouth ulcers are common and usually harmless, but they can be painful and make eating, drinking and brushing uncomfortable. Most heal on their own within one to two weeks. However, an ulcer that does not heal can occasionally be a sign of something more serious, so it is important to know when to seek advice.
Minor injuries from biting the cheek, sharp teeth, rough fillings, braces or ill-fitting dentures are common causes. Stress, hormonal changes, certain foods, some toothpastes and vitamin deficiencies can trigger recurring ulcers in some people.
Minor ulcers are small and heal within one to two weeks. Major ulcers are larger, deeper and take longer to heal. Clusters of tiny ulcers may occur in some people.
Avoid spicy, acidic and salty foods. Rinse with warm salt water and use a soft toothbrush. Pharmacy gels and mouthwashes can help.
See a dentist or doctor if an ulcer lasts more than two weeks, is very large, keeps recurring, or is accompanied by fever or feeling unwell.
Ulcers that do not heal, red or white patches, lumps, unexplained bleeding or numbness should be checked promptly, especially in smokers.
If an ulcer occurs in the same place repeatedly, a sharp tooth or appliance may be the cause. Your dentist can smooth or adjust it.
Maintain good oral hygiene, manage stress, eat a balanced diet and attend regular check-ups.
Recurring mouth ulcers can sometimes be linked to general health conditions, such as iron, vitamin B12 or folate deficiency, digestive conditions, or immune-related disorders. If you have frequent ulcers along with other symptoms such as tiredness, digestive problems or joint pain, your doctor may recommend blood tests or further assessment. Treating the underlying cause can reduce how often ulcers occur.
Dentures that rub or no longer fit properly can cause painful ulcers on the gums or palate. Remove dentures at night to let the tissues rest, and see your dentist if sore spots develop. A simple adjustment often solves the problem. Never ignore a denture sore that does not heal, as long-term irritation should be checked.
If you get frequent ulcers, keep a simple diary noting when they appear, how long they last and any possible triggers, such as certain foods, stress or a new toothpaste. This information can help your dentist or doctor identify patterns and recommend ways to reduce recurrences.
Some people find that toothpastes containing a foaming agent called sodium lauryl sulphate seem to trigger ulcers. If you get frequent ulcers, trying a toothpaste without this ingredient may help.
Staying well hydrated supports healing of the mouth lining, particularly in hot weather or during fasting. Sip water regularly whenever you can.
Most heal within one to two weeks.
If it lasts more than two weeks, recurs often or is unusually large.
Yes. Ill-fitting dentures can cause sores.
Book a check-up if you have a mouth ulcer that is not healing. Learn more about check-ups and cleaning in Al Ain.
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