Its not candid
Its mucous, when you wake up its thicker
If you feel inside red and burning while eating, ot would be rough also
Its desquamated mucosa, many reasons for that
One common is having hot food/beverages, spicy food, gastric disturbances
Also there are many other reasons
Wait 2 days to heal and then visit dentist
Next Steps
Consult dentist if not feeling well
Health Tips
Wait 2 days
Don’t eat spicy and hot, don’t have junk food
Eat light and home cooked
Drink lot’s of water