What do people usually mean by a mouth ulcer?
A mouth ulcer is a sore that forms on the inside of the mouth. Healthdirect describes mouth ulcers as sores on the soft lining — often with a pale or grey top and a red rim — and notes they may sit inside the lips or cheeks, on the gums, on the tongue, or on the floor of the mouth (healthdirect).
Better Health Channel describes a mouth ulcer as loss or erosion of part of the delicate tissue that lines the mouth (Better Health Channel). People also call them aphthous ulcers or canker sores. The exact cause is often unclear; triggers can include accidental cheek biting, rubbing from a sharp tooth edge or appliance, stress, certain foods, or other factors Australian sources list.
This page is about inside-mouth ulcers only. It is not about cold sores on or around the outer lip — that is a different topic with different advice for dental visits. See cold sores and dental visits if your concern is on the lip. Bleeding gums and looking after teeth when you are unwell are also separate guides; use them only if those topics fit what you are dealing with.
AMK Dental Clinic in Mortlake shares this as general information. It does not diagnose your sore or name a serious disease from a blog description.
How long do mouth ulcers usually last?
Many small mouth ulcers settle in about one to two weeks. Healthdirect notes that most mouth ulcers heal without treatment after one to two weeks (healthdirect). Better Health Channel says that in most cases mouth ulcers resolve within 10 to 14 days without the need for treatment (Better Health Channel).
Those figures describe common patterns reported by Australian health sources. They are not a personal prediction for every ulcer. Size, location, cause and overall health all differ between people. If your ulcer is not settling as you expect, a dentist or doctor can look at it in person.
What helps at home while an ulcer is sore?
Home comfort will not suit every person, but Australian sources describe practical steps many people use while a small ulcer is healing:
- Choose softer foods that are less likely to catch on the sore
- Avoid spicy, salty, sour or very hot foods and drinks while the area is tender (Better Health Channel; healthdirect)
- Keep brushing with a soft-bristled toothbrush, taking care around the sore rather than scrubbing hard
- Try not to poke or pick at the ulcer; Healthdirect notes that touching it can disturb healing (healthdirect)
- Some people rinse with warm salt water as described on healthdirect — spit the rinse out afterwards
Continue cleaning your teeth and, when you can, cleaning between them. Skipping brushing because of tenderness often leaves more plaque, which can irritate the mouth further. If brushing is too uncomfortable on one day, ask a pharmacist or your dentist what temporary options might suit you — this page does not recommend or prescribe medicines or gels.
Questions about over-the-counter products belong with a pharmacist or GP. AMK Dental Clinic can examine the mouth and discuss next steps if home comfort is not enough.
When should I see a dentist about a mouth ulcer?
Book a dental check if:
- An ulcer lasts longer than about two weeks
- Ulcers keep coming back often
- An ulcer seems to be growing or looks different from ones you have had before
- You have significant swelling or strong pain that makes eating, drinking or cleaning difficult
- You are simply worried about a change in your mouth and want it checked
Healthdirect advises seeing a doctor if a mouth ulcer lasts longer than two weeks or keeps coming back (healthdirect). Better Health Channel likewise advises seeing a dentist or doctor if ulcers do not clear within about two weeks or return frequently (Better Health Channel).
A dentist looks at the sore, asks about your history and habits, and may suggest further assessment or a medical review if that seems appropriate. That in-person look is different from reading a webpage. This article does not diagnose any specific disease for you.
If your main issue is bleeding when you brush, see bleeding gums: when to see a dentist. If you are recovering from a stomach bug or cold, see looking after your teeth when you are unwell. Those pages do not replace advice about an inside-mouth ulcer that is lasting or recurring.
How do I book at AMK Dental Clinic in Mortlake?
AMK Dental Clinic is at Shop 3, 46 Tennyson Road, Mortlake NSW 2137. Call (02) 9739 6525, use our Contact page, or follow how to book an appointment at AMK. Routine check-ups and cleans are a common time to mention a sore that has lingered or returned.
Tell reception you want an ulcer or sore in the mouth checked so the team can allow time for an examination. If facial swelling is severe, breathing feels affected, or you need urgent medical care, follow emergency guidance from healthdirect or call triple zero (000) — a blog post is not an emergency service.
This page is general information only. It is not a personal diagnosis, a treatment plan or a substitute for care from a dentist or doctor.
This article is general information only and is not a substitute for advice about your own situation. Please speak with a dentist about your needs.
Common questions
What do people usually mean by a mouth ulcer?
Healthdirect describes mouth ulcers as sores that form on the inside of the mouth. Better Health Channel describes a mouth ulcer as loss or erosion of part of the delicate lining inside the mouth. They often sit on the inner cheeks, lips, gums, floor of the mouth or tongue. This page is about those inside-mouth sores — not cold sores on the outer lip, which are a different topic. Ask AMK Dental Clinic in Mortlake if you are unsure what you are seeing.
How long do mouth ulcers usually last?
Healthdirect notes that most mouth ulcers heal without treatment after one to two weeks. Better Health Channel says many resolve within 10 to 14 days. Timelines vary between people and ulcers, so this is not a personal prediction. If an ulcer lasts longer than about two weeks, keeps returning, or worries you, book a check at AMK Dental Clinic in Mortlake rather than waiting it out alone.
What can I do at home while an ulcer is sore?
Eat softer foods and avoid spicy, salty, sour or very hot foods and drinks while the area is tender. Keep cleaning your teeth with a soft-bristled toothbrush, taking care around the sore rather than scrubbing hard. Healthdirect also suggests not touching the ulcer, and rinsing with salt water as one comfort option. Product or medicine questions belong with a pharmacist or GP — this page does not recommend or prescribe treatments.
Are mouth ulcers the same as cold sores?
No. Mouth ulcers sit on the soft lining inside the mouth. Cold sores usually appear on or around the outer lips and are linked with a common virus in Australian health sources. They are different conditions with different advice for dental visits. See our cold sores and dental visits guide for the lip topic only, and book AMK Dental Clinic if an inside-mouth ulcer needs a look in person.
When should I book at AMK Dental Clinic about a mouth ulcer?
Book if an ulcer lasts longer than about two weeks, keeps coming back often, seems to be growing, or comes with significant swelling or strong pain that interferes with eating or cleaning. Healthdirect and Better Health Channel both advise seeing a doctor or dentist when ulcers persist or recur. AMK Dental Clinic is at Shop 3, 46 Tennyson Road, Mortlake NSW 2137 — call (02) 9739 6525, use Contact, or see how to book. This page does not diagnose your sore.
