<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing headaches and nausea lately. I also feel like my vision has become blurry. I am worried that I might have cerebral edema.  <response>: Based on your symptoms, I would recommend a radiographic imaging procedure such as a MRI or a CAT scan of your head. We would also need to check your kidney function through a kidney function test, as well as your glucose level. If we confirm your diagnosis of cerebral edema, we would need to give you intravenous fluid replacement. 