Please suggest tips on dealing with canker sores?

No SLS: Your toothpaste may be the culprit. Many toothpastes contain sodium lauryl sulfate, or sls. This ingredient is found in soap, shampoo, toothpaste and mouthwash. Sls provides the “foaming action” that makes you feel like something spectacular is happening in your mouth. This ingredient has also been linked to recurrent canker sores. Try changing to toothpaste. Toms or rembrant. Must be "sls free".