Thanks for asking the query,
Sore tongue can be due to accidental biting on the tongue.
Apply dologel or mucopain oral ointment topically over the affected area on the tongue.
Maintain a good oral hygiene
, use lukewarm saline and antiseptic mouthwash gargles.
Pus from the surgical side can be due to food accumulation.
I would suggest you to visit to the concerned Oral Surgeon and get the checkup done.
Avoid eating of hot and spicy food stuffs.
Hope this helps out.