Mouth Ulcers: Causes, Treatment and When to See Your Dentist

Mouth ulcers can make ordinary activities like chewing or talking unexpectedly painful, prompting many to seek quick relief.

If you’ve ever had a sore spot in your mouth that seems to linger, understanding the causes and the proper treatment for mouth ulcers is key to relief. From occasional canker sores to recurring mouth ulcers, knowing how to manage them at home and seeking timely advice from a dentist can reduce pain and maintain overall oral well-being.

What Are Mouth Ulcers?

Mouth ulcers, also called aphthous ulcers, are small, tender sores that appear on the soft tissues inside your mouth. They usually have a round or oval shape, with a pale centre and a red rim. These ulcers are most commonly found on the inside of the cheeks, tongue, gums, or lips.

These sores come in several varieties, and each type presents slightly differently:

• Minor ulcers – Small, shallow sores that heal within one to two weeks without leaving scars.
• Major ulcers – Larger and deeper, these ulcers can take several weeks to heal and may leave slight scarring.
• Herpetiform ulcers – Small, clustered sores that appear in groups and can be very painful.

Understanding the type of ulcer you have can help guide the most effective treatment for canker sores.

Common Causes of Mouth Ulcers

Mouth ulcers can develop for many reasons. Some are minor and temporary, while others may indicate a deeper health concern. Common mouth sore causes include:

• Oral trauma – Accidentally biting your cheek, tongue, or lip, using a toothbrush too aggressively, or eating sharp or rough foods can damage the delicate lining of the mouth. Braces, dentures, and other dental devices can sometimes irritate soft oral tissues, leading to mouth ulcers.
• Stress – Both emotional and physical stress can suppress your immune system, making you more prone to ulcers.
• Hormonal changes – Fluctuations in hormones, particularly in women, can trigger mouth sores at certain points in the menstrual cycle.
• Nutritional deficiencies – Insufficient amounts of vitamin B12, iron, or folate may contribute to frequent mouth ulcers.
• Medicines – Some anti-inflammatories, chemotherapy drugs, or medicines that dry the mouth may increase susceptibility.
• Food sensitivities – Acidic, spicy, or salty foods, as well as some allergens, can trigger ulcers in sensitive individuals.
• Underlying health conditions – Immune disorders, gastrointestinal diseases such as Crohn’s, or other systemic conditions may contribute to persistent mouth ulcers.

Identifying what sets off your ulcers makes it easier to reduce their frequency and minimise pain.

Home Treatment Options

Most minor mouth ulcers heal on their own, but there are several ways to manage pain and promote healing at home:

• Saltwater rinse – Using a mild saltwater rinse throughout the day may help decrease discomfort and promote faster recovery of mouth sores.
• Over-the-counter gels and pastes – Products containing protective or soothing agents can form a barrier over the ulcer, easing pain during eating and speaking.
• Avoid irritants – Spicy, acidic, or crunchy foods may aggravate the sore. Reducing these can help ulcers heal faster.
• Soft diet – Soft foods such as yoghurt, mashed vegetables, and smoothies are gentler on sensitive areas.
• Pain relief – Paracetamol or ibuprofen can be used for temporary relief if recommended by your healthcare professional.
• Hydration and oral hygiene – Keeping the mouth clean with gentle brushing and regular hydration supports natural healing.

Even with home remedies, it’s important to monitor ulcers that don’t improve or keep recurring.

Prevention Tips for Recurring Ulcers

For those who experience frequent mouth ulcers, prevention is key:

• Focusing on foods that supply essential nutrients like B vitamins, iron, and folate can support healing and prevent ulcers from returning.
• Use a soft-bristled toothbrush to prevent trauma.
• Reduce stress through exercise, meditation, or mindfulness practices.
• Avoid foods and beverages known to irritate your mouth.
• Limit habits such as nail-biting or pen chewing, which can damage soft tissue.

Following these habits may lower how often ulcers appear and make them less painful day-to-day.

When to See Your Dentist

While most mouth ulcers are harmless, certain signs mean it’s time to seek professional care:

• Ulcers lasting longer than three weeks
• Large or unusually painful sores
• Recurring ulcers with no clear cause
• Ulcers that make eating, drinking, or speaking difficult
• Associated symptoms such as fever or general malaise

A dentist can evaluate whether your mouth ulcers are linked to a nutritional deficiency, medicine, or underlying condition. They may recommend medicated mouthwashes, prescription gels, or further investigations if needed.

Could It Be Something Else?

Not all mouth sores are simple ulcers, so it’s important to differentiate between conditions:

• Oral cancer – A persistent sore lasting more than three weeks should always be examined. Early detection is crucial.
• Cold sores – caused by the herpes virus tend to appear on the lips rather than inside the mouth.
• Other oral conditions – Infections, autoimmune disorders, and gastrointestinal diseases can also manifest as mouth sores.

Being aware of these distinctions ensures any serious conditions are addressed promptly.

Frequently Asked Questions

Are mouth ulcers contagious?

No, most aphthous ulcers are not contagious. Cold sores, however, can spread through close contact.

Can stress trigger mouth ulcers?

Yes. Stress is a common factor in the development of canker sores, and managing stress can reduce their frequency.

How long do mouth ulcers take to heal?

Minor ulcers usually heal within 1–2 weeks, while major or herpetiform ulcers may take several weeks.

Should I be concerned about recurring ulcers?

Recurring ulcers may indicate dietary deficiencies, stress, or other health conditions. Consult your Cheltenham dentist if they happen frequently.

Can medicines cause mouth ulcers?

Certain medicines, including chemotherapy drugs, anti-inflammatories, or drugs that dry the mouth, may increase the risk.

Is it normal for ulcers to bleed?

Minor bleeding can occur if the ulcer is irritated, but a dentist should assess persistent or heavy bleeding.

Mouth Ulcers Management in Cheltenham

If you’re dealing with recurring mouth ulcers or a mouth ulcer that won’t heal, Captivate Dental in Cheltenham can help. Our team offers tailored advice to manage discomfort, prevent future outbreaks, and address any underlying causes.

Call us today at (03) 9553 1249 or book online to arrange an appointment. Visit us at 36 Chesterville Road, Cheltenham, conveniently serving patients from Bentleigh, Highett, Hampton East, Moorabbin, and Brighton East.

With the right guidance, you can reduce discomfort, manage ulcers effectively, and enjoy a brighter, healthier smile.