Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern...
As per your complain and presentation of symptoms the swollen purple bump under the tongue can be a
MUCOCELE which is due to caused due to either clogged duct of the
salivary gland or can also be due to ruptured duct of the gland leading to formation of a small lump..
It commonly gets resolved on its own and does not need any treatment..
In case if it is persistent surgical removal has to be done..
If it is not a Mucocele it can be a
HEMATOMA formed due to
injury to some small blood vessel caused by injury with some hard food leading to pricking of a blood vessel and accumulation of blood into the soft tissues..
Hematoma resolves on its own and does not commonly needs treatment..
You should wait and watch for a week and in case if it does not resolve or sou signs of regression consult an oral physician and get evaluated..
Hope this information helps..
Thanks and regards..
Dr.Honey Nandwani Arora.