Mrsa Before And After How Long Can A Person Have Mrsa Or Staff Infection Before It Turns Into Blisters Or Sores ?

How long can a person have mrsa or staff infection before it turns into blisters or sores ? - mrsa before and after

My nephew was hit in the back, there has been a year or so he said he saw a doctor when she said just like a bump under the skin and the doctor, I don 'have no idea who has recently put on the sea When we returned, the pain was red and showed me today, and Eiter was good, my question is, what is it and how long U can infected and not know people?