iit's about the size is a dime maybe a lil bigger it's really light in color and clear fuild along with greenesh puss, been going on for a while, the clear fuilds are causing a rash now, and these last few days my chest, arms, i have red bumps/ sores all over, and my lymph nodes by my pelvise are swollen and painful to touch. what is this and how do i get rid of it?