question: I had a small hard lump on my buttock like a mosquito bote which developed a white head. This thing went massive and the area all around was all red and inflamed.i was very ill and had a fever.a lot of Brown and yellow liquidy pus came out and with some coaxing so did a long tube of rubbery white pus. This happened again in the same area on a later date.recently one apea red on my arm and them a small one on my neck. What is causing this and what should i do?