Hi.
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain the swollen knobs on the under side of tongue can be due to clogged duct of minor
Salivary gland causing swelling in duct of salivary gland or it can also be due to ruptured duct of the gland leading to spillage of mucous into the soft tissues and causing lump formation and the lumps are known as MUCOCELES..
In your cases it is the case of RECURRING MUCOCELES which when gets stretched while moving tongue or filling by mucous can lead to slight pain and tightness..
You should visit an Oral Physician and get evaluated and in case of Mucoceles as they are recurrent the treatment is Surgical excision of the mucoceles..
Small cysts can be removed by
laser ablation..
You can do concentrated salt water rinses as they help in shrinkage of the mucoceles..
Hope this information helps..
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Thanks and regards..
Dr.Honey Nandwani Arora..