does anyone know what this is?

Jessica
Can anyone help please my son has been sick for awhile now.. he's been to urgent care twice he had an ear infection, upper respiratory infection and bacterial infection in his eye.. He is done with his eye drops and this is last day on amoxicillin..and now this shows up. The only newish thing he has had is his milk that he's 
been drinking a lil over a week now.. I will take him in first thing in the morning but just wondering what guys think.