sore on roof of mouth

[unknown123]

hi i have a sore on the roof of my mouth for 2 weeks now i just thought it must got burnt but when i looked today its still there and now as like little blisters around it anyone know what it could be thanks

 

[pingpongmaster]

i was thinking the same, possibly a burn.
Mouth healing sores do take longer to heal.
Possibly try rinsing mouth with warm salt water.