Different things can trigger a canker sore. The most common are a bitten lip or cheek (which only becomes easier to bite again when it swells), long periods of stress and the strain that puts on the immune system, illness, poking braces wires or ill-fitting dentures, and highly acidic foods like lemons, strawberries, tomatoes, and pineapple.
Anyone who frequently develops canker sores should identify the triggers and try to avoid them, because an ounce of prevention is worth a pound of cure. This could mean cutting back on acidic foods, using dental wax during orthodontic treatment, and reducing stress levels.
Here are a few tips to help with canker sores when they appear:
1. Rinse with warm salt water to help the healing process.
2. Use painkillers or topical medication to reduce discomfort.
3. Find a toothpaste that doesn’t contain sodium laurel sulfate (it should still contain fluoride though).
4. Brush with a soft-bristled toothbrush.
5. Eat a diet rich in vitamin B12, iron, and folate (good sources include carrots, salmon, parsley, spinach, kale, and yogurt).
6. Maintain good oral hygiene habits. It’s easier to maintain good oral health when plaque is under control.