Hello,
I have lesions in my mouth that I found recently and tomorrow going to the hospital to see. But one thing that had me attention was that those were quite symmetrical in both sides of the mouth.
Anyone has any clue? About what it could be?

Hi there bilateral and symmetrical might just be cankers or perhaps an infection of some sort - But definitely have it checked out! Good luck!

There are all kinds of things that can go wrong and cause irritation or sores inside your mouth. If something has been there for over 2 weeks then its time to get checked out by an ENT (ear, nose and throat specialist). A biopsy is the only way to tell for certain what is wrong. It could be anything, even your teeth rubbing against your cheeks. Hope it turns out to be nothing serious!

Good luck!