Thanks for asking the query,
Burning sensation in the upper region of mouth can be because of pain radiating from the infected tooth.
It is also seen in a condition called burning mouth syndrome which is associated with dry mouth, metallic taste, tingling
of the mouth.
I suggest you to go through the complete dental examination .
Get an x-ray of the tooth.
Probably you have to go for root canal treatment of the tooth.
Maintain a good oral hygiene.
Drink lots of water.
Avoid eating hot and spicy food .
Take vitamin suplements like vitamin B12
Hope this helps out.