How to get rid of a canker sore
Most canker sores heal in 1–2 weeks; topical steroids or numbing gels speed relief. A provider can review recurring sores online — B12/iron deficiency is a common trigger.
Also called: mouth ulcer · canker sore treatment · aphthous ulcer
Medically reviewed by Dr. Ikechukwu Ogbu, MD
MD · Board-Certified, Internal Medicine · Last reviewed
What may be behind this
Clinical factors worth reviewing with a provider who knows your history. Not a diagnosis.
Cold sores
Commonly relevant for people looking into "How to get rid of a canker sore" — worth reviewing with a clinician who knows your history.
When to see a clinician
- You have an underlying condition (heart, kidney, liver, thyroid, pregnancy) that could interact with the plan
- You're already on prescription medications and want to check for interactions
- Symptoms are affecting sleep, work, or daily life and haven't improved with lifestyle changes
- You want personalized guidance based on labs rather than generic advice