<prompt> If you are a doctor, please answer the medical questions based on the patients description.On Nov 17th I underwent endoscopic third ventricularostomy surgery as a result of hydrocephalus, and although my headaches have finally subsided, I have started to experience the same cranial pressurepain on the left I experienced prior to being diagnosed with hydrocellitis. What might be the reason for this?  <response>: Hi, It is understandable your concern, taking in consideration your previous surgery. To exclude any connection we should have some information:Which part of the day the headache is worse? Usually morning headache, it has to do with your disease. Do you have any trouble with vision? Is it accompanied by nausea, vomiting? If your answers are positiver than an appointment with your DC would clarify your situation. Feel free for any other information. 