Canker Sores & Mouth Ulcers
For educational purposes only — not medical advice. Always consult a qualified healthcare provider. For adults 18+.
Small painful sores inside the mouth are common and usually harmless — but they can sting and keep coming back. This guide explains what causes mouth ulcers, how to soothe them, and when a sore needs a closer look.
What canker sores and mouth ulcers are, the common triggers, gentle ways people soothe them, how they differ from cold sores, and the warning signs that mean a sore should be checked.
What's inside
- →What mouth ulcers are — the common kind
- →Common triggers — stress, injury & more
- →Soothing sores — gentle comfort
- →Canker vs cold sores — telling them apart
- →Recurring ulcers — when they add up
- →When to get it checked — red flags
For educational purposes only
This guide is educational information about dental and oral health — it is not dental or medical advice, diagnosis, or treatment, and it is not a substitute for care from a qualified dentist. It does not diagnose, treat, cure, or prevent any condition. See a dentist for regular check-ups and about any tooth or gum problem, and ask your dentist before starting any whitening or new oral-care product. Seek prompt dental or medical care for severe or persistent tooth pain, facial or gum swelling, bleeding that won't stop, or signs of infection (swelling with fever); facial swelling that affects breathing or swallowing is an emergency — call 911.