What is a canker sore on tongue and what does it look like?

Try this: There are several over the counter medications developed to control canker sores. For those who prefer not to medicate you may try hene laser. The spot should be on the lesion for 30 seconds and cover the adjacent tissue. For more info: http://www.Webmd.Com/oral-health/guide/canker-sores there is also a link to photos.

Canker sores : Canker sores (aphthous ulcers) occur on mucous membranes not tongue or lips. They are thought to be caused by viruses and are exceedingly common. They usually resolve within 10 days. See http://www.Mayoclinic.Com/health/canker-sore/ds00354.