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

1471 Reviews

5.0

4th September 2026

Professional, friendly , caring.

4th September 2026

Prompt, efficient and friendly treatment and reception service.

3rd September 2026

High quality care and service all round

3rd September 2026

such a great clinic and the dentist is absolutely lovely and highly experienced.

JM

Jan McG

I've been attending the High Street Dental Practice for over 40 years. The staff are, and always have been, welcoming, warm, friendly, efficient and professional. Kate is an excellent dentist and this is a great dental practice.

BH

Bridget H

Always a friendly and efficient service from The High Street Dental Practice. Would highly recommend them, particularity Kate (Dentist) and Amy (Hygenist)

30th August 2026

Perhaps the most important thing is that the staff were welcoming and willing to repeat or discuss the advice until I've got it.

JR

Janell Rolland

The staff at High street Dental practice are helpful and caring. Very happy with my treatment.

26th August 2026

everyone is so professional and committed. from the receptionist to the hygenist and the dentist. they are all friendly, patient and take care to explain and understand your issues. customer care way beyond expectations.

26th August 2026

I have been a patient of High Street Dental Practice for about 50 years. The dentists and hygienists may change but the care and my personal experience is still wonderful. Thanks to all and everyone there.

23rd August 2026

The whole team are always friendly and polite.They keep the experience as relaxed, but professional.

22nd August 2026

I have been going to this surgery for many years. I have never had a bad experience. It is well organised, staff are professional and I trust them to give me the right advise.

21st August 2026

Friendly staff, excellent treatment, clean and pleasant surroundings. Helpful staff and excellent care.

20th August 2026

Always great. I've been coming to the High street dental practice (under different managements) for nigh on 50 years! Unique setting. Never too busy - all good!

CG

Christos Gabrielides

Excellent, caring and friendly service at the High Street Dental Practice.

KR

Kate Roberts

Super dental surgery, very friendly, caring staff.

20th August 2026

Everyone at the surgery are very friendly and helpful

17th August 2026

overall, very good experience

16th August 2026

Always pain free so I never feel nervous getting a procedure and everyone is friendly and make you feel calm.

15th August 2026

All staff really polite and professional.

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