So i've noticed two or three blister like bumps on the back of my tongue. no pain but it feels like a popcorn kernel is stuck on my tongue any ideas?

Its normal: The taste buds are sensory taste receptors found on the tongue, throat, and palate that help form the perception of taste.The tongue has several types of these taste buds (which number around 10,000). Most people, if they examine the posterior portion of the tongue will fine quite large "blister like bumps". This is part of normal anatomy.