I have this pains in my tongue and i can also see something like a boil in my mouth and this is getting bigger and bigger. i dont know what it is. ?

Tongue: Had to tell. May be an abscess. You should check it out today

See your dentist: Tongue blisters may appear due to various reasons and are painful sores. There are many forms of blisters: canker, sores, fever blisters, bacterial infection, etc. Regardless, any ulcer that lasts longer than 2-3 weeks should be checked out by your dentist or PCP.