Published: 2026-02-12
Updated: 2026-02-12
Editorial note
Map of Health content is prepared with an evidence-based approach. References are provided for transparency.
Medical disclaimer
This content is for informational purposes only and does not replace professional medical advice, diagnosis, or treatment. If you have an urgent medical concern, seek immediate care.
"Mouth ulcers are painful, small sores that usually heal within 7-10 days. They are primarily triggered by stress, physical injury, or nutritional deficiencies."
On this page:
Key Causes
Stress & Fatigue: Increases internal inflammation.
Nutritional Deficits: Lack of Vitamin B12, Iron, Folic Acid, or Zinc.
Irritants: SLS (Sodium Lauryl Sulfate) found in many toothpastes can irritate the oral mucosa.
Dietary Dos and Don'ts
Avoid: Acidic fruits (citrus), sodas, spicy/salty foods, and crunchy textures (like chips or crusty bread). Tomatoes and strawberries are also common triggers.
Eat: Protein-rich foods, leafy greens, chickpeas, and B12-fortified products.
