Hi My Grandson Is 7 Years Old And When You

Hi my grandson is 7 years old and when you squeeze his right breast blood oozes out.We took him to the ER and the did a X Ray and didn't find anything.They put him on antibiotics and told us to take him to him primary Doctor.We did, they could not find anything. Now the bleeding has started back and we are taking him tomorrow to Oklahoma Children Hospital., any idea what is going on.My Neice is a doctor and said it could be something in the glands and they may have to do a MRI. Thank You