Thanks for writing to H.C.M. for your query
I have gone through your query regarding bumps on posterior asect of tongue which are painful and swallowing becomes difficult due to pain.
You have told that you are suffering from allergic rhinitis
. Considering all aspect of your complaints it appears as your lymphoid tissue at the base of tongue are enlarge and are infected thus they hurt.
For treatment of this you should take- Antibiotic, anti inflammatory, and warm saline gargling.
I hope above treatment wil help you.