A white color bump which turned red and looks like an ulcer on my 4 year old's tongue. can somebody please help me with what this is ?

A. Dologel you can apply it actually looking like a mouth ulcer only so you can apply three times in the day or four times in the day and specially half an hour before you give food to the child because it’s going to be comforting for the child and this is a very good ointment it really will help in healing it very fast