Re: Small lump inside cheek
This is simply a mucous retention cyst and is entirely harmless. Many such cysts tend to undulate in size over the course of weeks or months, sometimes disappearing altogether and even reappearing on occasion. The cyst's origin is actually within the mucosal tissues of the oral cavity and in this case, located at the outer border.
It is not associated with any type of mass such as a tumor and will self-resolve in time.
You're fine.
Best regards,
Rutheford Rane, MD (ret.)
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Best regards and Good Health