Thanks for asking the query,
There are many reasons that can make your tongue sore and painful.
Accidental trauma due to biting or scalding of tongue can result in bumpy and sore tongue .
can irritatae the tongue .
Cancer sores and ulcers on the tongue .
Enlarged papillae if becomes inflammed and irritated .
Medical conditions including diabetes
and aneamia .
Oral cancers if the bump doesnt go away in a week or two consult a dentist
I would suggest you to consult a dentist and get a checkup done .
Clean the tongue with tongue cleaner .
Take vitamin suplements .
Maintain a good oral hygiene.
Apply dologel oral ointment topically over the affected area .
Hope this helps out .