I had a white sac looking bump by my ear for a while now and decided to squeeze it.  It hissed and a little fluid came out and a small white speck.  Now its very large red and extremely sore.  I pushed a sterilized safety pin through it and I got a little yellow thick pus out but now its spreading down my neck.
Welcome to Chat Doctor. 1. It seems like an infective etiology, probably hair follicle infection / inflammation with collection of pus and discharge with in.2. You should have not pricked with needle as you may cause infection and complicate.3. In this case you need to see your doctor - he may examine and if necessary give a small incision and Chat Doctor. 4. After that advice will be done not disturb the area, no pressing or scratching.5. Maintain local hygiene, clean with antiseptic liquid - helps in better healing process. Good luck. Hope I have answered your query.Anything to ask do not hesitate. Thank you.