Mouth Ulcer Treatment in Treherbert | NHS Pharmacy Advice

If you are looking for mouth ulcer treatment in Treherbert, Treherbert Pharmacy may be able to assess a simple aphthous mouth ulcer through the NHS Wales Common Ailments Service.

Simple aphthous ulcers are small, painful sores inside the mouth. They are usually round or oval, pale yellow or white with a red edge, and often heal within one to two weeks. The NHS pharmacy route is generally for patients aged 12 or over whose symptoms fit this uncomplicated pattern.

Eligible NHS consultations and any treatment supplied through the service are free. You can approach or book with the pharmacy directly and do not need a GP referral first. The pharmacist will check whether the Common Ailments Service is the right route for you.

Choose an NHS appointment if you would like help with this condition. The pharmacist will assess whether treatment is suitable or whether you need another service.

What is a simple aphthous mouth ulcer?

A mouth ulcer is a sore in the lining of the mouth. The most common type is a simple aphthous ulcer, which usually appears inside the lips or cheeks or on the tongue. It is not the same as a cold sore, which usually develops on or around the lips.

Minor aphthous ulcers are normally less than 1 cm across and heal without scarring. They can be triggered by minor injury, stress, certain foods or toothpaste ingredients, although an exact cause is not always clear. Recurrent, unusual or persistent ulcers can sometimes be linked to medicines or an underlying health problem and need a different assessment route.

Symptoms people often notice

• A painful sore inside the mouth: often on the inner lip, inside the cheek or on the tongue.
• A round or oval shape: usually with a pale yellow or white centre and a red edge.
• One or a few small ulcers: simple minor ulcers are usually less than 1 cm across.
• Pain when eating or drinking: particularly with spicy, salty, acidic, hot or rough foods.
• Healing within one to two weeks: uncomplicated minor ulcers usually settle without leaving a scar.

Can Treherbert Pharmacy help with mouth ulcer treatment?

The NHS Common Ailments Service is intended for simple aphthous mouth ulcers in patients aged 12 or over. The pharmacist must assess the ulcer before deciding whether advice or treatment through the service is appropriate.

Some symptoms outside the CAS pathway may still be suitable for a broader assessment by our pharmacist independent prescriber. Others need a dentist, GP, NHS 111 Wales or urgent medical care. The pharmacist will explain the safest route.

What happens during your consultation?

1. 1
   Private assessment. Your consultation will normally take place in a private room at Treherbert Pharmacy.
2. 2
   Ulcer review. The pharmacist will ask about the number, size, position, appearance and duration of the ulcers and may ask to look inside your mouth.
3. 3
   Clinical suitability check. Your age, previous episodes, medical history, medicines, allergies, pregnancy or breastfeeding status and any warning symptoms will be considered.
4. 4
   Advice, treatment or referral. You may receive self-care advice and, where clinically appropriate, treatment for pain, inflammation or infection prevention. A different service will be recommended if the ulcer is outside the CAS pathway.
5. 5
   Safety-netting. The pharmacist will explain how to use any treatment, what improvement to expect and when to contact a dentist, GP, NHS 111 Wales or urgent care.

What information may the pharmacist ask about?

• When the ulcer appeared, whether it is getting better or worse and whether it has been present for three weeks.
• How many ulcers there are, where they are, whether they hurt and whether any are larger than 1 cm.
• Whether ulcers have happened before and, if so, how often they recur.
• Whether a sharp tooth, denture, brace, accidental bite or other injury may be repeatedly rubbing the area.
• Any fever, feeling unwell, weight loss, bowel symptoms, ulcers elsewhere, difficulty swallowing or problems eating and drinking.
• Current medicines, allergies, medical conditions, immune-system problems and whether you are pregnant or breastfeeding.

When our pharmacist independent prescriber may be able to help

If your symptoms are not covered by the NHS Common Ailments Service, but you do not have any urgent warning signs, our pharmacist independent prescriber may still be able to assess you. Treatment can be prescribed where clinically appropriate, or we will explain which healthcare service you should use instead.

This broader assessment route may be considered for some non-urgent cases involving a patient under 12, a first episode after the age of 30, recurring ulcers, possible medicine-related symptoms or uncertainty about the cause. The pharmacist will decide whether pharmacy assessment is appropriate or whether a dentist, GP or another service is needed.

Do not use a routine independent prescribing appointment for an ulcer lasting three weeks, a painless or unusually large ulcer, significant bleeding, fever, immunosuppression, rapidly worsening symptoms or difficulty eating or drinking. Follow the urgent-help advice below.

Find out about our independent prescribing service

When you should seek urgent medical help

Do not wait for a routine pharmacy appointment when any of the following warning signs are present.

• Urgently contact a dentist or GP if a mouth ulcer has lasted for three weeks or longer. A persistent ulcer needs assessment to exclude a more serious cause, including mouth cancer.
• Seek same-day advice from a GP, dentist or NHS 111 Wales if the ulcer is painless, larger than 1 cm, appears in a group of five or more, is on the gums or roof of the mouth, is bleeding or becoming more painful and red.
• Seek same-day medical advice if you have a high temperature, feel generally unwell, have a weakened immune system or cannot eat or drink normally.
• Call 999 or go to A&E if swelling in the mouth or face makes it difficult to breathe or swallow, spreads towards the eye, or prevents you from opening your mouth properly.

What may help while a simple mouth ulcer heals?

• Use a soft toothbrush and avoid repeatedly touching or irritating the ulcer.
• Choose soft foods and avoid spicy, very salty, acidic, hot or rough foods and drinks.
• Cool drinks may be more comfortable; using a straw can reduce contact with a painful area.
• A warm salt-water mouth rinse may soothe discomfort. Swill it around the mouth and spit it out rather than swallowing it.
• Use any supplied or recommended treatment exactly as advised and return for help if symptoms worsen or do not improve as expected.

Free NHS advice and treatment

The NHS Wales Common Ailments Service provides a free pharmacist consultation for eligible patients with simple aphthous mouth ulcers. Any treatment supplied through the service is also free of charge.

• No GP referral is needed: you can book or approach Treherbert Pharmacy directly.
• Assessment comes first: the pharmacist must confirm that the ulcer fits the CAS pathway before supplying treatment.
• Treatment is not automatic: mild ulcers may only need self-care, while suitable patients may be offered symptom-relieving, anti-inflammatory or antiseptic treatment.
• Another route may be recommended: this could be independent prescribing, a dentist, GP, NHS 111 Wales or urgent care depending on the findings.

Book a mouth ulcer assessment at Treherbert Pharmacy

Choose the NHS appointment route for a new, painful mouth ulcer that appears uncomplicated. You do not need to obtain a GP referral before contacting the pharmacy.

Book an NHS pharmacy appointment

Choose an NHS appointment if you would like help with this condition. The pharmacist will assess whether treatment is suitable or whether you need another service.

Useful links

• Read about the NHS Common Ailments Service at Treherbert Pharmacy
• View all NHS pharmacy services in Treherbert
• Browse conditions covered by NHS pharmacy services
• Read NHS 111 Wales information about mouth ulcers
• Read the NHS Wales mouth ulcers patient information leaflet
• Read Welsh Medicines Advice Service information about the Common Ailments Service

Clinically reviewed by Jon James, Pharmacist Independent Prescriber. Last reviewed: June 2026.