What does it mean if you have raised bumps on the back of your tongue? these bumbs have been there for atleast 2 yrs. they haven't become any bigger, they remain the same size.

There : There are bumps at the back of the tongue that are likely normal anatomy. Try googling an image for "circumvallate papillae". You could also have a prominent lingual tonsil. Things that are more concerning would likely grow and cause other symptoms, pain with swallow, ear pain, problems swallowing, other lumps in the neck, voice changes.

Depends: Could be normal anatomy. There are large swellings there called "circumvalate papallae". See a dentist for proper evaluation.