A painful canker sore can make eating, drinking, and talking uncomfortable. Most minor canker sores heal on their own within one to two weeks. The options below focus on easing discomfort while the sore heals. Mayo Clinic
1. OralMedic protective barrier
OralMedic helps relieve mouth ulcer pain by forming a protective barrier over the sore as it heals. Read the Canadian package insert before use.
How to apply it:
- Dry the ulcer thoroughly with the included cotton-tipped applicator.
- Dip the opposite end of the applicator into the solution in the vial.
- Roll the applicator over the ulcer and its edges for 5 to 10 seconds.
- Immediately rinse your mouth thoroughly with water and spit it out.
- Discard the used applicator.
Stinging can occur during application. A white patch may form and flake off as the area heals. If pain remains after rinsing, the insert allows one immediate repeat application only. Do not treat the same ulcer again after that.
Safety: Do not use during pregnancy, on children under 12, or if you are allergic to materials containing sulphur. Use only on mouth ulcers. Do not apply to cold sores or fluid-filled blisters. Avoid eye contact and follow the full warnings in the package insert. OralMedic FAQ
2. Salt water rinse
A salt water rinse may ease discomfort. Dissolve one teaspoon of salt in one cup (250 mL) of warm water. Rinse your mouth and spit it out. HealthLink BC
3. Numbing gels
Some topical products temporarily ease pain. Ask a pharmacist which option is appropriate for you, and follow the directions and warnings on that product’s Canadian label. Mayo Clinic
4. Soft foods and cool drinks
Choose soft foods and cool drinks if chewing or swallowing stings. Avoid foods that irritate the sore, such as spicy, salty, or acidic foods. HealthLink BC
5. Ask about prescription treatment
If a sore is unusually painful, large, or keeps coming back, a dentist or doctor can examine it and may recommend a medicated rinse or a topical corticosteroid. Mayo Clinic
For more detail, read our guides on canker sores and diet and what causes canker sores.
When to See a Doctor
Most canker sores are harmless and heal within about two weeks. A sore larger than 1 cm, or one that hasn't healed after two weeks, warrants evaluation by a healthcare provider (Cleveland Clinic). Also see a provider if:
- You get canker sores very frequently (more than 3–4 per month)
- The sore comes with fever, rash, or difficulty swallowing
- You have trouble eating or drinking due to pain
Persistent or unusually severe canker sores can sometimes indicate an underlying condition. Visit our FAQ for answers to common questions, or contact us if you need help.
This article is for general information only and is not a substitute for professional dental or medical advice. See a dentist or doctor if the sore has not healed after two weeks. Seek advice sooner if it is unusually large, very painful, or keeps recurring. ORALMEDIC is a Class I medical device; always follow the product instructions.