Noticed 3 months ago, but went back through photos, it wasn’t there at all last year, but when I look through photos it’s became slightly Visable over the months and is now very visible all the time. 
he said it used to itch, refuses to wash on it as it makes him feel scared when it’s touched. Had an xray they said that was fine but recommended further investigation so he’s booked in at the child assessment unit Tuesday. Google makes me worry, but I know it could just be something not serious, just need some advice