Oral Ulcers Explained: Causes, Severity, and Telling Harmless Sores from Red Flags

🔥 Hurts Even to Drink Water? Is It More Than Just "Heatiness"?

"Doctor, my mouth is full of sores! It hurts to drink water, and eating is torture!" We hear this sentence countless times in the clinic. With the fast pace of life in Hong Kong, when people get mouth sores (commonly known as "Fei Zi" / Canker Sores), the immediate cause is often blamed on "Heatiness" (internal heat), lack of sleep, or too much fried food.

In most cases, you are right. But have you ever had a sore that stayed in the same spot for a long time without healing? Or is the pain unusually severe?

As your partner in oral health, today, the Home Dental team is here to unravel the truth about Oral Ulcers (oral ulcer). Besides vitamin deficiency, did you know that a chipped tooth or ill-fitting dentures can also be the culprit? How should you eat to speed up healing? Read on!

🔍 Why Do You Get Mouth Sores? Uncovering 5 Key Causes of Oral Ulcers

An oral ulcer is essentially an injury to the lining of the mouth (mucosa), exposing the nerves, which is why it is so painful. Besides the well-known factor of stress, here are several other key causes:

1. Traumatic Ulcers (traumatic ulcer) — The Dentist's Focus! 🦷
   This isn't always about health; sometimes, it's because your teeth are "too sharp":

• Broken/Chipped Teeth: A sharp tooth edge constantly rubs against the tongue or cheek lining.
• Ill-fitting Dentures/Braces: Loose dentures or protruding wires from braces cause chronic scraping of the mucosa.
• Biting: Rushing your meals or having misaligned teeth leads to frequently biting yourself.
• Crucial Point: These types of ulcers will never fully heal until the source of the trauma (sharpening the tooth, adjusting the denture) is addressed!

2. Recurrent Aphthous Ulcers (recurrent aphthous stomatitis)
   This is the most common "Fei Zi," linked to the immune system, genetics, and hormonal changes (e.g., menstrual cycle).
3. Nutritional Deficiencies
   A lack of iron, folic acid, Vitamin B12, or zinc can weaken the oral mucosa.
4. Food Irritation
   This aligns with the concept of "Heatiness." Consuming excessive amounts of hard (chips), hot, spicy, or acidic foods (pineapple, kiwi) can directly burn or scrape the delicate lining.
5. Serious Disease Warning
   Certain autoimmune diseases (like Crohn's disease, Behcet's disease) and even Oral Cancer can manifest as oral ulcers in their early stages.

📊 Oral Ulcer Classification: Which Type Do You Have?

Understanding the types helps you determine if you need to seek professional help:

🥗 What to Eat When You Have Mouth Sores (Do's & Don'ts)

To achieve rapid healing for oral ulcers, aside from applying medication, diet control is key. This is about reducing physical and chemical irritation.

✅ Recommended Soothing Foods (Do's):

• Liquid/Soft Foods: Congee, oatmeal, steamed egg, tofu, yogurt. (Probiotics in yogurt help balance oral flora).
• Foods Rich in Vitamin B & C: Dark green vegetables, guava, kiwi (blended into a juice to avoid acid irritation).
• Zinc: Oysters, lean meat, pumpkin seeds (aids in wound repair).
• Cold Drinks/Ice Cream: Moderate amounts of low-sugar ice cream or ice water can numb the nerves and provide temporary pain relief.

❌ Irritating Foods to Avoid (Don'ts):

• Very Hot Soups/Water: Heat causes blood vessels to dilate, exacerbating swelling and pain.
• Rough/Hard Foods: Fried chicken, chips, French bread, nuts (will scrape the wound).
• Spicy and Acidic Foods: Curry, spicy hotpot, lemon juice, vinegar.
• High-Sugar Foods: Sugar promotes bacterial growth, hindering the healing process.

🚑 Rapid Oral Ulcer Treatment: What Can the Dentist Do?

If you urgently need relief for a presentation, a wedding, or are in too much pain to sleep, what are your options besides waiting?

1. Common Pharmacy Solutions

• Steroid Pastes/Gels: Have anti-inflammatory effects; most effective when used right at the start of the ulcer.
• Protective Film Gels/Patches: Acts like a "bandage" to cover the wound and isolate it from food irritation. While they don't speed up healing, they provide comfort for eating.
• Antiseptic Mouthwash (Chlorhexidine): Prevents bacterial infection of the wound (Note: Long-term use can stain teeth).

2. Professional Dental Treatment (The Secret Weapon) ✨

• Low-Level Laser Therapy (Laser Therapy): This is the dental "black technology." Using a laser to treat the ulcer surface can instantly seal nerve endings (immediate pain relief!), kill viruses and bacteria, and promote cell regeneration. Often, a single session can halve the recovery time.
• Smoothing Sharp Teeth: If the cause is a Traumatic Ulcer, we will identify the "offending" sharp tooth or filling. A quick few-minute polishing can eliminate the source, and the ulcer will disappear within days and never recur.

🚨 When Do I Need to See a Doctor? The "Two-Week Rule"

Please remember this most important number: 2 Weeks.

If your oral ulcer:

1. Persists for more than 2 weeks without healing.
2. Feels hard or fixed when you touch it.
3. Is accompanied by white patches (Leukoplakia) or red patches (Erythroplakia) in the mouth.
4. Comes with unexplained swelling of the neck lymph nodes.

This could be a sign of oral cancer or precancerous lesions. This is not "Heatiness"; please contact a dentist immediately for examination or a Biopsy (biopsy).

🏁 Conclusion: Treating the Cause, Not Just the Symptom

While oral ulcers are common, they are more than just "Heatiness." They can be a signal of nutritional deficiency or, more critically, evidence of a sharp tooth or an ill-fitting dental restoration.

If your sores recur frequently, instead of just taking Vitamin B constantly, schedule a detailed oral examination.