Canker Sores
Canker sores [3] are little lesions that appear in your mouth, on the inside of your cheeks, under your tongue, under your lips, at the roof of your mouth, or close to the back of your throat.
The majority of canker sores have a circular, tiny center that is either white or yellow with a red border. They might hurt a lot, even if they are tiny. It can lead to throat irritation when a canker sore develops in the back corner of your throat.
The majority of canker sores heal on their own in two weeks. In the meantime, over-the-counter topical drugs like benzocaine (Orabase) or home cures can provide comfort.