Ds is nearly 3. Today we noticed four finger type bruises on his torso, like he was roughly held down maybe during a nappy change. He wears pull ups at home so only lies down for nappies at nursery. He hasn't reported any roughness but I am bothered. I took a pic and it comes up quite clearly. I am now feeling worried about where these came from and if it's not something that happened at nursery that he has just bruised easily because he has something wrong with him e.g. Cancer. What is best way to tackle this, if there is any? I appreciate this may sound v anxious but they really are very much like fingers grabbed him very hard prob from behind...