Can you get a canker sore from burning your mouth on pizza?

Typically - no: Usually all you get is a burn. However, herpes can be activated by trauma. We sometimes see patients develop a herpetic cluster at the injection site where local anesthetic was placed. So, unless you have this kind of response, any canker sore development would be coincidental. Of course, if you really want to , you could run an experiment on yourself , but not recommended. Good Luck.

No, canker sores: is the most common oral lesions. Most tongue ulcers, infections will clear up by themselves within a week or two. You should see your GP or dentist if the ulcer gets worse or lasts for longer than 2 weeks. Oral cancer appears as a growth or sore in the mouth that does not go away. If concerned see your dentist ASAP.