Thanks for writing to us.
Lumpy pus on tongue may be due to Aphthous ulcer on tongue or due to Depapillation as well as inflammation caused due to continuous betel nut chewing,too much intake of spicy foods.
I would advice you to get a thorough clinical evaluation done.
Apply Anaesthetic gel on the affected area.
Avoid spicy foods,betel nut chewing.
Vitamin B-COMPLEX supplements has to be administered.
Maintain oral hygiene
Hope this helps.