I have a bump on my back its been there for some yrs now. Whenever I squeeze it brown stuff comes out and it smells really bad.  Could u plz tell me what that might be. It doesnt normally hurt only when I squeeze it. But fr time to time it does itch but not often.
This swelling can be a sebaceous cyst.  It may be since long time and usually not causes any symptoms.  It contains brown cheesy material.  If you are having problem with this like pain and heaviness, surgical removal is needed.  It is very small surgery, and you can go home same day.  If you don't need surgery other option is antibiotics and Chat Doctor.