Mouth Ulcers: Why Do They Keep Popping Up and How Can You Actually Get Rid of Them?

If you’ve ever had a mouth ulcer, you know how a tiny, pale sore can completely take over your day. Eating your favourite meal, sipping warm morning coffee, or simply talking during a meeting suddenly becomes a painful ordeal.

While most mouth ulcers clear up on their own, the constant sting—and the mystery of why they keep returning—can be frustrating. Here is a breakdown of why these painful spots pop up and what you can do to soothe them and keep them away for good.

What Triggers Mouth Ulcers?

Mouth ulcers (often called canker sores) are non-contagious shallow sores that form on the soft tissues inside your cheeks, lips, gums, or tongue. They typically appear white or light grey in the centre with an inflamed red border.

While the exact underlying cause isn’t always singular, common triggers include:

1. Minor Mouth Trauma: Accidental cheek bites, over-zealous toothbrushing, sharp tooth edges, or rubbing from braces or ill-fitting dental appliances.
2. Stress and Fatigue: High stress levels and lack of sleep weaken your immune response, making delicate oral tissues far more vulnerable to breakout sores.
3. Nutritional Deficiencies: Low levels of essential nutrients like Vitamin B12, iron, or folate frequently trigger recurrent ulcers.
4. Dietary Sensitivity: Acidic, spicy, or crunchy foods—as well as tomatoes, citrus fruits, and coffee—can irritate delicate tissue and spark a flare-up.
5. SLS Toothpastes: Sodium Lauryl Sulfate (SLS), a foaming agent found in many commercial toothpastes, can dry out or irritate the protective lining inside your mouth.

How to Get Rid of Mouth Ulcers Faster?

While time is the ultimate healer, you don’t have to endure days of sharp discomfort. Here are practical ways to speed up recovery and ease the pain:

1. Rinse with Warm Salt Water: Dissolve half a teaspoon of salt in a glass of warm water and gently swish it around your mouth. Salt water naturalizes acids, cleanses the area, and supports natural healing.
2. Apply Topical Anesthetic Gels: Over-the-counter soothing gels or pastes create a protective barrier over the ulcer, temporarily numbing the pain so you can eat comfortably.
3. Switch to an SLS-Free Toothpaste: If you suffer from frequent ulcers, swapping to a mild, SLS-free toothpaste can dramatically reduce recurring irritation.
4. Use a Soft-Bristled Toothbrush: Gently brush around sensitive areas using a soft toothbrush to avoid further scraping or physical trauma.
5. Adjust Your Diet Temporarily: Stick to soft, bland foods and steer clear of hot, spicy, or highly acidic dishes until the sore completely closes.

When Should You See a Dentist?

Most ulcers resolve naturally within 7 to 14 days. However, if an ulcer lasts longer than two weeks, causes severe pain, keeps recurring relentlessly, or is accompanied by a sharp tooth edge rubbing against your cheek, it’s time to have a professional take a look.

Persistent sores can occasionally indicate an underlying dental issue, a fitting adjustment needed for appliances, or other systemic health factors.

Protect Your Smile with Gentle Care in Maroubra

At Gentle and Caring Dentistry, we believe taking care of your oral health shouldn’t be uncomfortable or stressful. Whether you’re dealing with persistent mouth ulcers, a sharp tooth that needs smoothing, or simply overdue for a routine check-up, our dedicated team is here to provide exceptional care tailored to your unique needs.

Don’t let small oral discomforts hold you back. Contact Gentle and Caring Dentistry today to experience affordable, compassionate dental treatments right here in Maroubra Junction.