I have had a cyst on my back for at least 8 years. It has never caused any pain or anything. I asked my doctor if he could remove it, and he said that he could, however, it would probably grow back. No problem, I will leave it. Maybe 3 weeks ago it started growing and has become painful. It looked like it was coming to a head, so, my girlfriend squeezed it. Green liquid came out. Not a lot but the cyst shrunk a bit. I have had smaller ones come to a head and white stinky puss easily came out. Should I be concerned because of the pain and green liquid?
Thanks.