I have small blisters/bumps in the back of tongue, how can this be treated??

Probably normal. There are large taste buds on the back of the tongue. You may have just "noticed" them. Ask your dentist the next time you have an oral check-up Hope this helps! Dr Z.
Duplicate question. Duplicate question. Maybe circumvallate papillae. See my other reply.
Post a pic. If you could post a pic it will be much easier to recognize.