I had an arachnoid cyst drained about a year ago with the burr hole method. I have felt a little bit of pressure on my surgery scar, that is the best way to describe it. I did hit the scar recently after pulling something off a shelf. The last couple days I have been having nose bleeds. It could be a lot of things, though. I was wondering if the cyst came back, if anything like that could happen. It was a very large cyst, about the size of a tangerine.