Staphylococcus is group of bacteria and can be dangerous if not treated properly. There are many diseases like diarrhea, vomit, dehydration, nausea etc associated with staph. The most dangerous disease is Toxic shock syndrome which can lead to death. I am not sure what you are looking when you say staph in head. However, for complete details of staph, risk and diseases associated with it, you should click here.
