If you've had an aneurysm treated by coiling you must have wondered about those coils in your head. What are they made of? How did they get there? Will they come out? Will I need more? Well I'm going to attempt to answer some of those questions here.   Firstly, My qualifications: I'm not a doctor or surgeon. Nor indeed am I a medical expert of any kind, but I suffered a brain haemorrhage in 2006 due to a ruptured aneurysm and had it treated by coiling. One of the things that concerned