We were sat having dinner at tea time this evening and noticed my almost 5 year old son has darkening under both his eyes, mainly near his nose. He looks like he has 2 black eyes coming. He has been in school today and I have not been told of any injuries and he is saying he hasn't hurt himself. Should I be worried? Should I take him to be checked out? Do we wait until Monday, get him seen sooner? This has never happened before. He is generally a pale child if that changes anything. Thank you in advance