Ds is recovering from Chicken Pox and is scabbing nicely. Today he banged his face and was having a cry. Whilst checking their were no loose teeth and blood 
I noticed a greeny/yellowy patch on his upper gum above his left incisor. He isn't in pain with it and when brushing teeth this morning didn't flinch. He is 3 yo btw. Could it be CP related. It seems to be the only one in there 