Can I get treated online for how to get rid of a canker sore?

Yes. A licensed provider on Ondoc reviews your symptoms and, when appropriate, prescribes treatment for the underlying cause — most commonly Cold sores.

How fast will I hear back?

Most online visits are reviewed in under 24 hours. Refills are often same-day.

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 July 2026

Seek urgent care or the ER if you have:

Symptoms that are sudden, severe, or rapidly worsening
High fever (over 103°F / 39.4°C) that doesn't respond to treatment
Chest pain, trouble breathing, fainting, or confusion
Signs of dehydration — dizziness, dark urine, unable to keep fluids down
Symptoms in someone who is pregnant, immunocompromised, or over 65

What how to get rid of a canker sore could be

The most common causes a clinician considers. This isn't a diagnosis — it's the differential a provider works through with you.

Cold sores

Commonly relevant when someone is researching "how to get rid of a canker sore" — worth reviewing with a clinician who knows your history.

Typical workup

What a clinician usually orders or asks about when someone presents with how to get rid of a canker sore.

Focused history: timing, triggers, severity, and prior treatments related to "how to get rid of a canker sore"
Targeted physical exam of the involved system
Rule-in / rule-out workup for the most likely causes: Cold sores
Baseline labs when relevant (CBC, CMP, TSH, vitamin D, lipid panel) to personalize the plan

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