Mouth ulcers concerns

Mouth ulcers are painful sores that appear in the mouth, usually on the soft tissue - cheeks, lips or tongue. They can be white, red, yellow or grey in colour and swollen.

Although they're uncomfortable, mouth ulcers are usually harmless and clear up by themselves within a week or two.

In many cases, the reason for mouth ulcers is unclear, but triggers are thought to include:

  • Accidentally biting the inside of your cheek or a sharp tooth
  • Poorly fitting dentures
  • Hard food
  • A defective filling
  • Stress and anxiety
  • Hormonal changes – some women develop mouth ulcers during their monthly period
  • Eating certain foods – such as chocolate, spicy foods, coffee, peanuts, almonds, strawberries, cheese, tomatoes and wheat flour
  • Toothpaste containing sodium lauryl sulphate
  • Stopping smoking – when you first stop smoking, you may develop mouth ulcers
  • Viral infections – including the cold sore virus, chickenpox, and hand, foot and mouth disease
  • Medical conditions - including vitamin B12 or iron deficiency, Crohn's disease, coeliac disease, reactive arthritis, HIV, lupus, Behçet’s disease
  • Certain medications or medical treatments may also cause mouth ulcers

It's usually safe to treat mouth ulcers at home to help reduce swelling and ease any discomfort.

Self care

Tips for easing discomfort and aid healing…

  • Antimicrobial mouthwash or protective paste, available from your pharmacist
  • Use a soft toothbrush to brush your teeth
  • Use a toothpaste that doesn’t contain sodium lauryl sulphate, as this may be irritating
  • Avoid hard, spicy, salty, acidic or hot food and drink until the ulcer heals
  • Use a straw to drink cool drinks
  • Avoid things that may be triggering your mouth ulcers

Mouth ulcers can sometimes be a possible symptom of a more serious problem such as infection or mouth cancer. It's therefore essential that you contact High Street Dental Practice as soon as possible if you notice:

  • Your mouth ulcer has lasted three or more weeks
  • You keep getting mouth ulcers
  • Your mouth ulcer becomes more painful or red
Patient Reviews

People are talking about us

The biggest complement we receive is when our patients refer their friends and family to High Street Dental Practice. In fact, we have built much of our practice on these valued, trusted recommendations over the years. Read our reviews to hear why our patients are recommending us…

Patient reviews

1431 Reviews

5.0

26th July 2026

Very efficient and professional as well as welcoming and friendly.

26th July 2026

I've been using the practice for several years and as a consequence, my oral health is better than it's ever been. Great team, great service.

25th July 2026

Best dental care supported by a really competent admin staff, consistently over years.

24th July 2026

Have attended this dentist for many years and have always been more than happy with treatment and kindness I am a nervous patient and find them very supportive

24th July 2026

The Hygienist and the dentist were very friendly and welcoming as were their assistants and the receptionist. I have been a patient at the High Street Dental Practice for many years and the expert care and treatment I have received is always very thorough and of high quality. I could not ask for anything better.

24th July 2026

Friendly staff make you feel welcome. The waiting room is relaxing with calming music. Everything is clean and inviting. Reception explained everything after.

23rd July 2026

Everything was done very professionaly with full explanations. I liked the new screens for displaying X ray images without leaving the chair! Airflow GPT is excellent in faster

23rd July 2026

All staff very friendly and explained the proposed procedures and as the treatment went along

23rd July 2026

Everybody is very friendly & professional.

22nd July 2026

As normal it was a check up and all went ahead as normal I have a clean initially and then see the dentist.

MP

M Puplett

Friendly and professional staff. Every step of my treatment was explained clearly and my views listened to.

18th July 2026

The hygienist was very thorough and respectful. She explained the procedure at each stage.

17th July 2026

All the staff are helpful, cheerful and make you feel at ease. I feel they know me and are there to help.

16th July 2026

They were very kind. I'm a wimp who is afraid of dentists but Helena understands and I feel relaxed with her.

TP

T. Poore

As always ,in spite of not wanting to be at the dentist ,it’s always good to be there with helpful smiling people .i can’t ever say I’ve had a bad experience there .i just wish you could find that kind of reception with other businesses .Thankyou to all who work there faithfully TPoore.

12th July 2026

My appointment was on time the hygienist was friendly and knowledgeable, the treatment was pain free, my teeth felt smooth and clean after, I’m not sure what airflow gbt is so I’m not sure if I had it, but she did clean using a different/new method so maybe?

10th July 2026

This was an emergency appointment. It was scheduled quickly & I am very grateful

SH

Shaun Haffenden

Everyone is always helpful and polite and very friendly

9th July 2026

All staff very friendly and everything went smoothly

4th July 2026

Staff are very welcoming and the hygienist is particularly interested in making my visit a good experience

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