 [ Symptoms ] i have three canker sores in my mouth is this a bad sign  there are 2 on my tongue and one on the roof of my mouth in the back and i also have a bad sore throat its been like this for 4 days and its very uncomfortable could it be a sign of something worse than just canker sores [ Disease ] many people get canker sores aphthous ulcers this is not a sign of anything bad or ominous they should resolve spontaneously in a week or so if not you will need to see your medical provider for an examination