Thanks for writing to us.
Burning post extraction of roots of teeth is due to unhealed extraction socket.
Take complete course of antibiotics-analgesics.
Swish with lukewarm saline frequently.
Irrigate the socket with betadine
and apply eugenol,lignocaine into the socket to enhance healing.
Meanwhile,rinse your mouth after every meals.
Maintain oral hygiene
Avoid intake of spicy foods,smoking
Take adequate rest ,avoid stressful jobs.
Hope this helps out.