Whats the difference between gingivitis and a cancor sore?

Oral Health: Gingivitis is the inflammation of the gingiva (gums) surrounding your teeth It is usually generalized but can be localized to one area. An aphthous ulcer (canker sore) is a lesion that will present on your oral mucosa and although painful, will resolve on its own in about two weeks. From the symptoms you described it is best to see a local dentist for treatment while you still have teeth to treat.