I just wanted to say that I am new to this site. I have been dealing with hydrocephalus for the last 29 years. I have had several revisions, most recent being 1993. Overall i've been doing ok. I have occasional severe headaches, and extreme bouts of short-term memory loss, also bouts of feeling like im in a fog. My surgeon has advised me not to drive because of unpredictable behavior. I manage to hold down a full time job with this and also live on my own. Lately I have been experiencing bouts of fatigue with occasional bad headaches -- nothing continuous as to warrant a shunt failure. My last CAT scan came back good and after 14 years of no problems. I know what to look for as far as a shunt failure is concerned, Im just confused with regards to fatigue. All other possibilites have been ruled out: Low blood sugar, low blood pressure,etc and sleep study performed. Trying to figure out if my fogginess and fatigue could be in anyway associated with the previous shunt revisions.